Astronomy Picture of the Day<p>APOD from 2025-07-13</p><p>Planetary <a href="https://mastodon.bot/tags/Nebula" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Nebula</span></a> Mz3: The Ant Nebula</p><p>Planetary nebula Mz3's ant-like shape may be due to a second star or the central star's spin and magnetic field, influencing the high-speed gas ejection. Understanding Mz3 could shed light on our Sun's future.</p><p>HD image at <a href="https://apod.nasa.gov/apod/ap250713.html#space" rel="nofollow noopener" target="_blank"><span class="invisible">https://</span><span class="ellipsis">apod.nasa.gov/apod/ap250713.ht</span><span class="invisible">ml#space</span></a> <a href="https://mastodon.bot/tags/astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astronomy</span></a> <a href="https://mastodon.bot/tags/earth" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>earth</span></a> <a href="https://mastodon.bot/tags/universe" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>universe</span></a></p>
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#nebula
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grobi<p>2025 July 13</p><p>Planetary Nebula Mz3: The Ant Nebula<br> * Image Credit: NASA, ESA, R. Sahai (JPL) et al., Hubble Heritage Team<br><a href="https://www.nasa.gov/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="">nasa.gov/</span><span class="invisible"></span></a><br><a href="https://www.esa.int/https://science.jpl.nasa.gov/people/Sahai/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">esa.int/https://science.jpl.na</span><span class="invisible">sa.gov/people/Sahai/</span></a><br><a href="https://www.jpl.nasa.gov/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="">jpl.nasa.gov/</span><span class="invisible"></span></a></p><p>Explanation: <br>Why isn't this ant a big sphere? Planetary nebula Mz3 is being cast off by a star similar to our Sun that is, surely, round. Why then would the gas that is streaming away create an ant-shaped nebula that is distinctly not round? Clues might include the high 1000-kilometer per second speed of the expelled gas, the light-year long length of the structure, and the magnetism of the star featured here at the nebula's center. One possible answer is that Mz3 is hiding a second, dimmer star that orbits close in to the bright star. A competing hypothesis holds that the central star's own spin and magnetic field are channeling the gas. Since the central star appears to be so similar to our own Sun, astronomers hope that increased understanding of the history of this giant space ant can provide useful insight into the likely future of our own Sun and Earth.<br><a href="https://esahubble.org/news/heic0101/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">esahubble.org/news/heic0101/</span><span class="invisible"></span></a><br><a href="https://science.nasa.gov/asset/hubble/the-ant-nebula-menzel-3-fiery-lobes-protrude-from-dying-sun-like-star/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">science.nasa.gov/asset/hubble/</span><span class="invisible">the-ant-nebula-menzel-3-fiery-lobes-protrude-from-dying-sun-like-star/</span></a><br><a href="https://en.wikipedia.org/wiki/Mz_3" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">en.wikipedia.org/wiki/Mz_3</span><span class="invisible"></span></a></p><p><a href="https://ui.adsabs.harvard.edu/abs/2004AJ....128.1694G/abstract" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">ui.adsabs.harvard.edu/abs/2004</span><span class="invisible">AJ....128.1694G/abstract</span></a><br><a href="https://apod.nasa.gov/apod/ap971106.html" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">apod.nasa.gov/apod/ap971106.ht</span><span class="invisible">ml</span></a> </p><p><a href="https://apod.nasa.gov/apod/ap250713.html" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">apod.nasa.gov/apod/ap250713.ht</span><span class="invisible">ml</span></a></p><p><a href="https://defcon.social/tags/space" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>space</span></a> <a href="https://defcon.social/tags/earth" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>earth</span></a> <a href="https://defcon.social/tags/nebula" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nebula</span></a> <a href="https://defcon.social/tags/astrophotography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astrophotography</span></a> <a href="https://defcon.social/tags/photography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>photography</span></a> <a href="https://defcon.social/tags/science" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>science</span></a> <a href="https://defcon.social/tags/astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astronomy</span></a> <a href="https://defcon.social/tags/physics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>physics</span></a> <a href="https://defcon.social/tags/nature" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nature</span></a> <a href="https://defcon.social/tags/NASA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>NASA</span></a></p>
Daniel Pomarède<p>The Cat's Paw Nebula, captured by JWST</p><p>Credits: NASA, ESA, CSA, STScI <br><a href="https://webbtelescope.org/contents/media/images/2025/129/01JY2AEHHAE4057AGG56YHW1CQ" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">webbtelescope.org/contents/med</span><span class="invisible">ia/images/2025/129/01JY2AEHHAE4057AGG56YHW1CQ</span></a></p><p><a href="https://mastodon.social/tags/JWST" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>JWST</span></a> <a href="https://mastodon.social/tags/Webb" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Webb</span></a> <a href="https://mastodon.social/tags/nebula" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nebula</span></a> <a href="https://mastodon.social/tags/nebulae" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nebulae</span></a> <a href="https://mastodon.social/tags/CatsPawNebula" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>CatsPawNebula</span></a> <a href="https://mastodon.social/tags/astrophotograpy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astrophotograpy</span></a> <a href="https://mastodon.social/tags/astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astronomy</span></a> <a href="https://mastodon.social/tags/astrodon" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astrodon</span></a></p>
grobi<p>2024 September 18<br>A starfield is shown with a long blue-glowing nebula taking up much of the frame. The nebula appears, to some, similar to a fish or a mermaid. </p><p>The Mermaid Nebula Supernova Remnant<br> * Image Credit & Copyright: Neil Corke; Text: Natalia Lewandowska (SUNY Oswego)<br><a href="https://app.astrobin.com/u/NeilCorke#gallery" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">app.astrobin.com/u/NeilCorke#g</span><span class="invisible">allery</span></a><br><a href="https://ww1.oswego.edu/physics/profile/natalia-lewandowska" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">ww1.oswego.edu/physics/profile</span><span class="invisible">/natalia-lewandowska</span></a><br><a href="https://ww1.oswego.edu/physics/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">ww1.oswego.edu/physics/</span><span class="invisible"></span></a></p><p>Explanation: <br>New stars are born from the remnants of dead stars. The gaseous remnant of the gravitational collapse and subsequent death of a very massive star in our Milky Way created the G296.5+10.0 supernova remnant, of which the featured Mermaid Nebula is part. Also known as the Betta Fish Nebula, the Mermaid Nebula makes up part of an unusual subclass of supernova remnants that are two-sided and nearly circular. Originally discovered in X-rays, the filamentary nebula is a frequently studied source also in radio and gamma-ray light. The blue color visible here originates from doubly ionized oxygen (OIII), while the deep red is emitted by hydrogen gas. The nebula's mermaid-like shape has proven to be useful for measurements of the interstellar magnetic field.</p><p><a href="https://apod.nasa.gov/apod/ap240918.html" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">apod.nasa.gov/apod/ap240918.ht</span><span class="invisible">ml</span></a></p><p><a href="https://defcon.social/tags/space" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>space</span></a> <a href="https://defcon.social/tags/nebula" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nebula</span></a> <a href="https://defcon.social/tags/astrophotography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astrophotography</span></a> <a href="https://defcon.social/tags/photography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>photography</span></a> <a href="https://defcon.social/tags/science" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>science</span></a> <a href="https://defcon.social/tags/astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astronomy</span></a> <a href="https://defcon.social/tags/physics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>physics</span></a> <a href="https://defcon.social/tags/nature" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nature</span></a> <a href="https://defcon.social/tags/NASA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>NASA</span></a> <a href="https://defcon.social/tags/ESA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ESA</span></a></p>
Daniel Pomarède<p>NOIRLab image of the week: Dueling Dust Dragons (in Space!)</p><p>The Fighting Dragons of Ara, formally designated NGC 6188, is an emission nebula located about 4000 light-years away near the edge of a large molecular cloud in the constellation Ara (the Altar).</p><p>Credit: Dark Energy Survey/DOE/FNAL/DECam/CTIO/NOIRLab/NSF/AURA<br>Image processing: R. Colombari and M. Zamani (NSF’s NOIRLab)</p><p><a href="https://noirlab.edu/public/images/iotw2528b/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">noirlab.edu/public/images/iotw</span><span class="invisible">2528b/</span></a> </p><p><a href="https://mastodon.social/tags/NOIRLab" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>NOIRLab</span></a> <a href="https://mastodon.social/tags/Nebula" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Nebula</span></a> <a href="https://mastodon.social/tags/Astrophotography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Astrophotography</span></a> <a href="https://mastodon.social/tags/nebulae" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nebulae</span></a> <a href="https://mastodon.social/tags/NGC6188" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>NGC6188</span></a> <a href="https://mastodon.social/tags/astrodon" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astrodon</span></a></p>
Astronomy Picture of the Day<p>APOD from 2025-07-10</p><p>Lynds Dark <a href="https://mastodon.bot/tags/Nebula" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Nebula</span></a> 1251</p><p>Stars are born in LDN 1251, the "Rotten Fish Nebula," 1,000 light-years away in the Cepheus region. This dark nebula is filled with shocks and outflows from new stars, including Herbig-Haro objects. The view spans 25 light-years and includes distant galaxies obscured by dust.</p><p>HD image at <a href="https://apod.nasa.gov/apod/ap250710.html#space" rel="nofollow noopener" target="_blank"><span class="invisible">https://</span><span class="ellipsis">apod.nasa.gov/apod/ap250710.ht</span><span class="invisible">ml#space</span></a> <a href="https://mastodon.bot/tags/astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astronomy</span></a> <a href="https://mastodon.bot/tags/galaxy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>galaxy</span></a></p>
grobi<p>Using data from NASA's Hubble and Webb space telescopes, astronomers and artists modeled the iconic Pillars of Creation in the Eagle Nebula (Messier 16 or M16) in three dimensions, creating a movie that allows viewers to fly past and among the pillars. </p><p>The new visualization helps viewers experience how two of the world's most powerful space telescopes work together to provide a more complex and holistic portrait of the pillars. Hubble sees objects that glow in visible light, at thousands of degrees. Webb's infrared vision, which is sensitive to cooler objects with temperatures of just hundreds of degrees, pierces through obscuring dust to see stars embedded in the pillars.</p><p>A bonus product from this visualization is a new 3D printable model of the Pillars of Creation. The base model of the four pillars used in the visualization has been adapted to the STL file format, so that viewers can download the model file and print it out on 3D printers. Examining the structure of the pillars in this tactile and interactive way adds new perspectives and insights to the overall experience.</p><p>Printable 3D Model:<br><a href="https://universe-of-learning.org/contents/products/pillars-of-creation-3d-model" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">universe-of-learning.org/conte</span><span class="invisible">nts/products/pillars-of-creation-3d-model</span></a></p><p>Credit: <br> * Producers: Greg Bacon and Frank Summers (STScI), NASA's Universe of Learning; <br> * Visualization: Greg Bacon, Ralf Crawford, Joseph DePasquale, Leah Hustak, Danielle Kirshenblat, Christian Nieves, Joseph Olmsted, Alyssa Pagan, and Frank Summers (STScI), Robert L. Hurt (Caltech, IPAC); Science <br> * Advisor: Anna McLeod (Durham University); <br> * Music: Joseph DePasquale (STScI)</p><p><a href="https://science.nasa.gov/missions/hubble/new-hubble-webb-pillars-of-creation-visualization/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">science.nasa.gov/missions/hubb</span><span class="invisible">le/new-hubble-webb-pillars-of-creation-visualization/</span></a></p><p><a href="https://defcon.social/tags/space" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>space</span></a> <a href="https://defcon.social/tags/nebula" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nebula</span></a> <a href="https://defcon.social/tags/astrophotography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astrophotography</span></a> <a href="https://defcon.social/tags/photography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>photography</span></a> <a href="https://defcon.social/tags/science" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>science</span></a> <a href="https://defcon.social/tags/astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astronomy</span></a> <a href="https://defcon.social/tags/physics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>physics</span></a> <a href="https://defcon.social/tags/nature" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nature</span></a> <a href="https://defcon.social/tags/NASA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>NASA</span></a> <a href="https://defcon.social/tags/ESA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ESA</span></a> <a href="https://defcon.social/tags/education" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>education</span></a></p>
grobi<p>2024 October 22</p><p>M16: Pillars of Star Creation<br> * Image Credit: NASA, ESA, CSA, STScI; Processing: Diego Pisano<br><a href="https://www.instagram.com/_diegopisano_/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="">instagram.com/_diegopisano_/</span><span class="invisible"></span></a><br><a href="https://www.nasa.gov/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="">nasa.gov/</span><span class="invisible"></span></a><br><a href="https://www.esa.int/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="">esa.int/</span><span class="invisible"></span></a><br><a href="https://www.asc-csa.gc.ca/eng/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="">asc-csa.gc.ca/eng/</span><span class="invisible"></span></a><br><a href="https://www.stsci.edu/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="">stsci.edu/</span><span class="invisible"></span></a></p><p>Explanation: <br>These dark pillars may look destructive, but they are creating stars. This pillar-capturing picture of the Eagle Nebula combines visible light exposures taken with the Hubble Space Telescope with infrared images taken with the James Webb Space Telescope to highlight evaporating gaseous globules (EGGs) emerging from pillars of molecular hydrogen gas and dust. The giant pillars are light years in length and are so dense that interior gas contracts gravitationally to form stars. At each pillar's end, the intense radiation of bright young stars causes low density material to boil away, leaving stellar nurseries of dense EGGs exposed. The Eagle Nebula, associated with the open star cluster M16, lies about 7000 light years away. </p><p>High Resolution:<br><a href="https://apod.nasa.gov/apod/image/2410/M16_HubbleWebbPisano_6500.jpg" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">apod.nasa.gov/apod/image/2410/</span><span class="invisible">M16_HubbleWebbPisano_6500.jpg</span></a></p><p><a href="https://apod.nasa.gov/apod/ap241022.html" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">apod.nasa.gov/apod/ap241022.ht</span><span class="invisible">ml</span></a></p><p><a href="https://defcon.social/tags/space" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>space</span></a> <a href="https://defcon.social/tags/nebula" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nebula</span></a> <a href="https://defcon.social/tags/astrophotography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astrophotography</span></a> <a href="https://defcon.social/tags/photography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>photography</span></a> <a href="https://defcon.social/tags/science" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>science</span></a> <a href="https://defcon.social/tags/astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astronomy</span></a> <a href="https://defcon.social/tags/physics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>physics</span></a> <a href="https://defcon.social/tags/nature" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nature</span></a> <a href="https://defcon.social/tags/NASA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>NASA</span></a> <a href="https://defcon.social/tags/ESA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ESA</span></a></p>
grobi<p>The tiny open cluster at the center of the Heart Nebula (IC1805) is known as Melotte 15. But it’s not really the cluster we’re interested in, it’s the amazing, twisty bit of nebulosity there that steals the show. This image is the combination of data from two scopes: the Vixen R200SS Newtonian and the TS-Optics Photoline 130 refractor. Both have nearly the same focal length (922 and 908mm, respectively) with their correctors included. I shot the same target 48 hours apart in order to do a head-to-head comparison, but the results were so good for both scopes that I combined them into a single image.</p><p>Text credit<br>Charles Bracken <br><a href="https://app.astrobin.com/i/flz30w" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">app.astrobin.com/i/flz30w</span><span class="invisible"></span></a></p><p><a href="https://defcon.social/tags/space" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>space</span></a> <a href="https://defcon.social/tags/nebula" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nebula</span></a> <a href="https://defcon.social/tags/astrophotography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astrophotography</span></a> <a href="https://defcon.social/tags/photography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>photography</span></a> <a href="https://defcon.social/tags/science" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>science</span></a> <a href="https://defcon.social/tags/astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astronomy</span></a> <a href="https://defcon.social/tags/physics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>physics</span></a> <a href="https://defcon.social/tags/nature" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nature</span></a> <a href="https://defcon.social/tags/NASA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>NASA</span></a> <a href="https://defcon.social/tags/ESA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ESA</span></a></p>
grobi<p>2024 May 1</p><p>IC 1795: The Fishhead Nebula<br> * Image Credit & Copyright: Roberto Colombari & Mauro Narduzzi<br><a href="https://www.flickr.com/people/110872523@N07/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">flickr.com/people/110872523@N0</span><span class="invisible">7/</span></a><br><a href="https://app.astrobin.com/u/ToolMayNARD#gallery" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">app.astrobin.com/u/ToolMayNARD</span><span class="invisible">#gallery</span></a></p><p>Explanation: <br>To some, this nebula looks like the head of a fish. However, this colorful cosmic portrait really features glowing gas and obscuring dust clouds in IC 1795, a star forming region in the northern constellation Cassiopeia. The nebula's colors were created by adopting the Hubble color palette for mapping narrowband emissions from oxygen, hydrogen, and sulfur atoms to blue, green and red colors, and further blending the data with images of the region recorded through broadband filters. Not far on the sky from the famous Double Star Cluster in Perseus, IC 1795 is itself located next to IC 1805, the Heart Nebula, as part of a complex of star forming regions that lie at the edge of a large molecular cloud. Located just over 6,000 light-years away, the larger star forming complex sprawls along the Perseus spiral arm of our Milky Way Galaxy. At that distance, IC 1795 would span about 70 light-years across. </p><p><a href="https://apod.nasa.gov/apod/ap240501.html" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">apod.nasa.gov/apod/ap240501.ht</span><span class="invisible">ml</span></a></p><p><a href="https://defcon.social/tags/space" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>space</span></a> <a href="https://defcon.social/tags/nebula" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nebula</span></a> <a href="https://defcon.social/tags/astrophotography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astrophotography</span></a> <a href="https://defcon.social/tags/photography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>photography</span></a> <a href="https://defcon.social/tags/science" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>science</span></a> <a href="https://defcon.social/tags/astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astronomy</span></a> <a href="https://defcon.social/tags/physics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>physics</span></a> <a href="https://defcon.social/tags/nature" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nature</span></a> <a href="https://defcon.social/tags/NASA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>NASA</span></a> <a href="https://defcon.social/tags/ESA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ESA</span></a></p>
grobi<p>2013 December 27</p><p>Melotte 15 in the Heart<br> * Image Credit & Copyright: Jimmy Walker<br><a href="https://www.darkskywalker.com/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="">darkskywalker.com/</span><span class="invisible"></span></a></p><p>Explanation: <br>Cosmic clouds seem to form fantastic shapes in the central regions of emission nebula IC 1805. Of course, the clouds are sculpted by stellar winds and radiation from massive hot stars in the nebula's newborn star cluster, Melotte 15. About 1.5 million years young, the cluster stars are near the center of this colorful skyscape, along with dark dust clouds in silhouette. Dominated by emission from atomic hydrogen, the telescopic view spans about 30 light-years. But wider field images reveal that IC 1805's simpler, overall outline suggests its popular name - The Heart Nebula. IC 1805 is located along the northern Milky Way, about 7,500 light years distant toward the constellation Cassiopeia. </p><p><a href="https://apod.nasa.gov/apod/ap131227.html" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">apod.nasa.gov/apod/ap131227.ht</span><span class="invisible">ml</span></a></p><p><a href="https://defcon.social/tags/space" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>space</span></a> <a href="https://defcon.social/tags/nebula" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nebula</span></a> <a href="https://defcon.social/tags/astrophotography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astrophotography</span></a> <a href="https://defcon.social/tags/photography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>photography</span></a> <a href="https://defcon.social/tags/science" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>science</span></a> <a href="https://defcon.social/tags/astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astronomy</span></a> <a href="https://defcon.social/tags/physics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>physics</span></a> <a href="https://defcon.social/tags/nature" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nature</span></a> <a href="https://defcon.social/tags/NASA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>NASA</span></a> <a href="https://defcon.social/tags/ESA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ESA</span></a></p>
grobi<p>2018 February 14</p><p>In the Heart of the Heart Nebula<br> * Credit & Copyright: Alan Erickson</p><p>Explanation: <br>What's that inside the Heart Nebula? First, the large emission nebula dubbed IC 1805 looks, in whole, like a human heart. It's shape perhaps fitting of the Valentine's Day, this heart glows brightly in red light emitted by its most prominent element: hydrogen. The red glow and the larger shape are all created by a small group of stars near the nebula's center. In the heart of the Heart Nebula are young stars from the open star cluster Melotte 15 that are eroding away several picturesque dust pillars with their energetic light and winds. The open cluster of stars contains a few bright stars nearly 50 times the mass of our Sun, many dim stars only a fraction of the mass of our Sun, and an absent microquasar that was expelled millions of years ago. The Heart Nebula is located about 7,500 light years away toward the constellation of the mythological Queen of Aethiopia (Cassiopeia).</p><p><a href="https://apod.nasa.gov/apod/ap180214.html" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">apod.nasa.gov/apod/ap180214.ht</span><span class="invisible">ml</span></a></p><p><a href="https://defcon.social/tags/space" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>space</span></a> <a href="https://defcon.social/tags/nebula" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nebula</span></a> <a href="https://defcon.social/tags/astrophotography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astrophotography</span></a> <a href="https://defcon.social/tags/photography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>photography</span></a> <a href="https://defcon.social/tags/science" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>science</span></a> <a href="https://defcon.social/tags/astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astronomy</span></a> <a href="https://defcon.social/tags/physics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>physics</span></a> <a href="https://defcon.social/tags/nature" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nature</span></a> <a href="https://defcon.social/tags/NASA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>NASA</span></a> <a href="https://defcon.social/tags/ESA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ESA</span></a></p>
grobi<p>"The next few posts are a real 'matter of the heart'"<br> <br>2024 December 17</p><p>Near to the Heart Nebula<br>* Image Credit & Copyright: Jeff Horne & Drew Evans<br><a href="https://www.instagram.com/jeffreyhorne" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="">instagram.com/jeffreyhorne</span><span class="invisible"></span></a><br><a href="https://www.instagram.com/drewjevans" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="">instagram.com/drewjevans</span><span class="invisible"></span></a></p><p>Explanation: <br>What excites the Heart Nebula? First, the large emission nebula on the upper left, catalogued as IC 1805, looks somewhat like a human heart. The nebula glows brightly in red light emitted by its most prominent element, hydrogen, but this long-exposure image was also blended with light emitted by sulfur (yellow) and oxygen (blue). In the center of the Heart Nebula are young stars from the open star cluster Melotte 15 that are eroding away several picturesque dust pillars with their atom-exciting energetic light and winds. The Heart Nebula is located about 7,500 light years away toward the constellation of Cassiopeia. This wide field image shows much more, though, including the Fishhead Nebula just below the Heart, a supernova remnant on the lower left, and three planetary nebulas on the image right. Taken over 57 nights, this image is so deep, though, that it clearly shows fainter long and complex filaments.<br><a href="https://www.instagram.com/p/DC1wDJZvRO8/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="">instagram.com/p/DC1wDJZvRO8/</span><span class="invisible"></span></a> <br><a href="https://apod.nasa.gov/apod/ap031022.html" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">apod.nasa.gov/apod/ap031022.ht</span><span class="invisible">ml</span></a><br><a href="https://apod.nasa.gov/apod/ap040917.html" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">apod.nasa.gov/apod/ap040917.ht</span><span class="invisible">ml</span></a></p><p>Location:<br><a href="https://en.wikipedia.org/wiki/Cassiopeia_(constellation)" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">en.wikipedia.org/wiki/Cassiope</span><span class="invisible">ia_(constellation)</span></a></p><p>Main Element:<br><a href="https://en.wikipedia.org/wiki/Hydrogen" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">en.wikipedia.org/wiki/Hydrogen</span><span class="invisible"></span></a></p><p><a href="https://apod.nasa.gov/apod/ap241217.html" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">apod.nasa.gov/apod/ap241217.ht</span><span class="invisible">ml</span></a></p><p><a href="https://defcon.social/tags/space" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>space</span></a> <a href="https://defcon.social/tags/nebula" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nebula</span></a> <a href="https://defcon.social/tags/astrophotography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astrophotography</span></a> <a href="https://defcon.social/tags/photography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>photography</span></a> <a href="https://defcon.social/tags/science" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>science</span></a> <a href="https://defcon.social/tags/astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astronomy</span></a> <a href="https://defcon.social/tags/physics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>physics</span></a> <a href="https://defcon.social/tags/nature" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nature</span></a> <a href="https://defcon.social/tags/NASA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>NASA</span></a> <a href="https://defcon.social/tags/ESA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ESA</span></a></p>
grobi<p>2025 July 10</p><p>Lynds Dark Nebula 1251<br> * Image Credit & Copyright: Cristiano Gualco<br><a href="https://app.astrobin.com/u/CristianoGualco#gallery" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">app.astrobin.com/u/CristianoGu</span><span class="invisible">alco#gallery</span></a></p><p>Explanation: <br>Stars are forming in Lynds Dark Nebula (LDN) 1251. About 1,000 light-years away and drifting above the plane of our Milky Way galaxy, LDN 1251 is also less appetizingly known as "The Rotten Fish Nebula." The dusty molecular cloud is part of a complex of dark nebulae mapped toward the Cepheus flare region. Across the spectrum, astronomical explorations of the obscuring interstellar clouds reveal energetic shocks and outflows associated with newborn stars, including the telltale reddish glow from scattered Herbig-Haro objects hiding in the image. Distant background galaxies also lurk in the scene, almost buried behind the dusty expanse. This alluring telescopic frame spans almost three full moons on the sky. That corresponds to over 25 light-years at the estimated distance of LDN 1251.<br><a href="https://app.astrobin.com/u/CristianoGualco?i=qyrq8r#gallery" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">app.astrobin.com/u/CristianoGu</span><span class="invisible">alco?i=qyrq8r#gallery</span></a><br><a href="https://ui.adsabs.harvard.edu/abs/1962ApJS....7....1L/abstract" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">ui.adsabs.harvard.edu/abs/1962</span><span class="invisible">ApJS....7....1L/abstract</span></a><br><a href="https://arxiv.org/abs/1503.02934" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">arxiv.org/abs/1503.02934</span><span class="invisible"></span></a><br><a href="https://arxiv.org/abs/0809.4761" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">arxiv.org/abs/0809.4761</span><span class="invisible"></span></a><br><a href="https://chandra.harvard.edu/photo/scale_distance.html" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">chandra.harvard.edu/photo/scal</span><span class="invisible">e_distance.html</span></a><br><a href="https://science.nasa.gov/missions/hubble/awakening-newborn-stars/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">science.nasa.gov/missions/hubb</span><span class="invisible">le/awakening-newborn-stars/</span></a></p><p><a href="https://apod.nasa.gov/apod/ap250710.html" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">apod.nasa.gov/apod/ap250710.ht</span><span class="invisible">ml</span></a></p><p><a href="https://defcon.social/tags/space" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>space</span></a> <a href="https://defcon.social/tags/nebula" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nebula</span></a> <a href="https://defcon.social/tags/astrophotography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astrophotography</span></a> <a href="https://defcon.social/tags/photography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>photography</span></a> <a href="https://defcon.social/tags/science" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>science</span></a> <a href="https://defcon.social/tags/astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astronomy</span></a> <a href="https://defcon.social/tags/physics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>physics</span></a> <a href="https://defcon.social/tags/nature" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nature</span></a> <a href="https://defcon.social/tags/NASA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>NASA</span></a> <a href="https://defcon.social/tags/ESA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ESA</span></a></p>
grobi<p>2024 November 25</p><p>The Horsehead Nebula<br> * Image Credit & Copyright: Alex Lin (Chilescope)<br><a href="https://app.astrobin.com/u/MadNug#gallery" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">app.astrobin.com/u/MadNug#gall</span><span class="invisible">ery</span></a><br><a href="https://en.wikipedia.org/wiki/CHILESCOPE" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">en.wikipedia.org/wiki/CHILESCO</span><span class="invisible">PE</span></a></p><p>Explanation: <br>One of the most identifiable nebulas in the sky, the Horsehead Nebula in Orion, is part of a large, dark, molecular cloud. Also known as Barnard 33, the unusual shape was first discovered on a photographic plate in the late 1800s. The red glow originates from hydrogen gas predominantly behind the nebula, ionized by the nearby bright star Sigma Orionis. The darkness of the Horsehead is caused mostly by thick dust, although the lower part of the Horsehead's neck casts a shadow to the left. Streams of gas leaving the nebula are funneled by a strong magnetic field. Bright spots in the Horsehead Nebula's base are young stars just in the process of forming. Light takes about 1,500 years to reach us from the Horsehead Nebula. The featured image was taken from the Chilescope Observatory in the mountains of Chile. </p><p><a href="https://apod.nasa.gov/apod/ap241125.html" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">apod.nasa.gov/apod/ap241125.ht</span><span class="invisible">ml</span></a></p><p><a href="https://defcon.social/tags/space" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>space</span></a> <a href="https://defcon.social/tags/nebula" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nebula</span></a> <a href="https://defcon.social/tags/astrophotography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astrophotography</span></a> <a href="https://defcon.social/tags/photography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>photography</span></a> <a href="https://defcon.social/tags/science" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>science</span></a> <a href="https://defcon.social/tags/astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astronomy</span></a> <a href="https://defcon.social/tags/physics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>physics</span></a> <a href="https://defcon.social/tags/nature" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nature</span></a> <a href="https://defcon.social/tags/NASA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>NASA</span></a> <a href="https://defcon.social/tags/ESA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ESA</span></a></p>
grobi<p>2025 March 10</p><p>NGC 1499: The California Nebula<br> * Image Credit & Copyright: Toni Fabiani Mendez<br><a href="https://www.instagram.com/toni_fabiani/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="">instagram.com/toni_fabiani/</span><span class="invisible"></span></a></p><p>Explanation: <br>Could Queen Calafia's mythical island exist in space? Perhaps not, but by chance the outline of this molecular space cloud echoes the outline of the state of California, USA. Our Sun has its home within the Milky Way's Orion Arm, only about 1,000 light-years from the California Nebula. Also known as NGC 1499, the classic emission nebula is around 100 light-years long. On the featured image, the most prominent glow of the California Nebula is the red light characteristic of hydrogen atoms recombining with long lost electrons, stripped away (ionized) by energetic starlight. The star most likely providing the energetic starlight that ionizes much of the nebular gas is the bright, hot, bluish Xi Persei just to the right of the nebula. A regular target for astrophotographers, the California Nebula can be spotted with a wide-field telescope under a dark sky toward the constellation of Perseus, not far from the Pleiades. <br><a href="https://en.wikipedia.org/wiki/California_Nebula" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">en.wikipedia.org/wiki/Californ</span><span class="invisible">ia_Nebula</span></a></p><p><a href="https://apod.nasa.gov/apod/ap250310.html" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">apod.nasa.gov/apod/ap250310.ht</span><span class="invisible">ml</span></a></p><p><a href="https://defcon.social/tags/space" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>space</span></a> <a href="https://defcon.social/tags/nebula" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nebula</span></a> <a href="https://defcon.social/tags/astrophotography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astrophotography</span></a> <a href="https://defcon.social/tags/photography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>photography</span></a> <a href="https://defcon.social/tags/science" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>science</span></a> <a href="https://defcon.social/tags/astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astronomy</span></a> <a href="https://defcon.social/tags/physics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>physics</span></a> <a href="https://defcon.social/tags/nature" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nature</span></a> <a href="https://defcon.social/tags/NASA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>NASA</span></a> <a href="https://defcon.social/tags/ESA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ESA</span></a></p>
grobi<p>2025 June 25</p><p>"Rubin's First Look"<br>A Sagittarius Skyscape<br> * Image Credit & License: NSF–DOE Vera C. Rubin Observatory<br><a href="https://rubinobservatory.org/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">rubinobservatory.org/</span><span class="invisible"></span></a></p><p>Explanation: <br>This interstellar skyscape spans over 4 degrees across crowded starfields toward the constellation Sagittarius and the central Milky Way. A First Look image captured at the new NSF–DOE Vera C. Rubin Observatory, the bright nebulae and star clusters featured include famous stops on telescopic tours of the cosmos: Messier 8 and Messier 20. An expansive star-forming region over a hundred light-years across, Messier 8 is also known as the Lagoon Nebula. About 4,000 light-years away the Lagoon Nebula harbors a remarkable cluster of young, massive stars. Their intense radiation and stellar winds energize and agitate this cosmic lagoon's turbulent depths. Messier 20's popular moniker is the Trifid. Divided into three parts by dark interstellar dust lanes, the Trifid Nebula's glowing hydrogen gas creates its dominant red color. But contrasting blue hues in the colorful Trifid are due to dust reflected starlight. The Rubin Observatory visited the Trifid-Lagoon field to acquire all the image data during parts of four nights (May 1-4). At full resolution, Rubin's magnificent Sagittarius skyscape is 84,000 pixels wide and 51,500 pixels tall.</p><p><a href="https://apod.nasa.gov/apod/ap250625.html" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">apod.nasa.gov/apod/ap250625.ht</span><span class="invisible">ml</span></a></p><p><a href="https://defcon.social/@grobi/114742138088169984" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">defcon.social/@grobi/114742138</span><span class="invisible">088169984</span></a></p><p><a href="https://defcon.social/tags/space" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>space</span></a> <a href="https://defcon.social/tags/nebula" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nebula</span></a> <a href="https://defcon.social/tags/astrophotography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astrophotography</span></a> <a href="https://defcon.social/tags/photography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>photography</span></a> <a href="https://defcon.social/tags/science" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>science</span></a> <a href="https://defcon.social/tags/astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astronomy</span></a> <a href="https://defcon.social/tags/physics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>physics</span></a> <a href="https://defcon.social/tags/nature" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nature</span></a> <a href="https://defcon.social/tags/NASA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>NASA</span></a> <a href="https://defcon.social/tags/ESA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ESA</span></a></p>
grobi<p>2007 August 4</p><p>Sagittarius Triplet<br> * Credit & Copyright: Steve Mazlin, Jim Misti<br><a href="http://www.mistisoftware.com/astronomy/index.htm" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">http://www.</span><span class="ellipsis">mistisoftware.com/astronomy/in</span><span class="invisible">dex.htm</span></a><br><a href="https://ourcolorfulcosmos.com/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">ourcolorfulcosmos.com/</span><span class="invisible"></span></a></p><p>Explanation: <br>These three bright nebulae are often featured in telescopic tours of the constellation Sagittarius and the crowded starfields of the central Milky Way. In fact, 18th century cosmic tourist Charles Messier cataloged two of them; M8, the nebula below and right of center, and colorful M20 at the upper right. The third, NGC 6559, is left of M8, separated from the the larger nebula by a dark dust lane. All three are stellar nurseries about five thousand light-years or so distant. The expansive M8, over a hundred light-years across, is also known as the Lagoon Nebula while M20's popular moniker is the Trifid. This stunning digital view is actually a collaborative composite recorded by 2 cameras and 2 telescopes about 2 thousand miles apart. The deep, wide image field was captured under dark Arizona skies. Both M8 and M20 were recorded in more detail from an observatory in Pennsylvania. Glowing hydrogen gas creates the dominant red color of the emission nebulae, with contrasting blue hues, most striking in the Trifid, due to dust reflected starlight.</p><p><a href="https://apod.nasa.gov/apod/ap070804.html" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">apod.nasa.gov/apod/ap070804.ht</span><span class="invisible">ml</span></a></p><p><a href="https://defcon.social/tags/space" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>space</span></a> <a href="https://defcon.social/tags/nebula" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nebula</span></a> <a href="https://defcon.social/tags/astrophotography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astrophotography</span></a> <a href="https://defcon.social/tags/photography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>photography</span></a> <a href="https://defcon.social/tags/science" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>science</span></a> <a href="https://defcon.social/tags/astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astronomy</span></a> <a href="https://defcon.social/tags/physics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>physics</span></a> <a href="https://defcon.social/tags/nature" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nature</span></a> <a href="https://defcon.social/tags/NASA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>NASA</span></a> <a href="https://defcon.social/tags/ESA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ESA</span></a></p>
grobi<p>2009 May 19</p><p>Sagittarius and the Central Milky Way<br> * Credit & Copyright: Robert Gendler <br><a href="http://www.robgendlerastropics.com/Biography.html" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">http://www.</span><span class="ellipsis">robgendlerastropics.com/Biogra</span><span class="invisible">phy.html</span></a></p><p>Explanation: <br>What does the center of our Milky Way Galaxy look like? In visible light, no one knows! It is not possible to see the Galactic center in light our eyes are sensitive to because the thick dust in the plane of our Galaxy obscures it. If one looks in the direction of our Galaxy's center - which is toward the constellation of Sagittarius - many beautiful wonders become apparent, though. Large dust lanes and star clouds dominate the picture. As many as 30 Messier Objects are visible in the above spectacular image mosaic, including all types of nebulas and star clusters. Two notable nebula include the Lagoon Nebula (M8), a red patch just above and to the right of center, and slightly to its right is the red and blue Trifid Nebula (M20). </p><p><a href="https://apod.nasa.gov/apod/ap090519.html" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">apod.nasa.gov/apod/ap090519.ht</span><span class="invisible">ml</span></a></p><p><a href="https://defcon.social/tags/space" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>space</span></a> <a href="https://defcon.social/tags/nebula" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nebula</span></a> <a href="https://defcon.social/tags/astrophotography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astrophotography</span></a> <a href="https://defcon.social/tags/photography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>photography</span></a> <a href="https://defcon.social/tags/science" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>science</span></a> <a href="https://defcon.social/tags/astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astronomy</span></a> <a href="https://defcon.social/tags/physics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>physics</span></a> <a href="https://defcon.social/tags/nature" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nature</span></a> <a href="https://defcon.social/tags/NASA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>NASA</span></a> <a href="https://defcon.social/tags/ESA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ESA</span></a></p>
grobi<p>2009 May 21</p><p>IC 4592: A Blue Horsehead<br> * Credit & Copyright: Rogelio Bernal Andreo</p><p>Explanation: <br>This complex of beautiful, dusty reflection nebulae lies in the constellation Scorpius along the plane of our Milky Way Galaxy. Its overall outline suggests a horsehead in profile, though it covers a much larger region than the better known Horsehead Nebula of Orion. The star near the eye of the horse and the center of the 5 degree wide field, is embedded in blue reflection nebula IC 4592 over 400 light-years away. At that distance, the view spans nearly 40 light-years. The horse's gaze seems fixed on Beta Scorpii, also named Graffias, the bright star at the lower left. Toward the top right, near the horse's ear, is another striking bluish reflection nebula, IC 4601. The characteristic blue hue of reflection nebulae is caused by the tendency of interstellar dust to more strongly scatter blue starlight. </p><p><a href="https://apod.nasa.gov/apod/ap090521.html" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">apod.nasa.gov/apod/ap090521.ht</span><span class="invisible">ml</span></a></p><p><a href="https://defcon.social/tags/space" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>space</span></a> <a href="https://defcon.social/tags/nebula" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nebula</span></a> <a href="https://defcon.social/tags/astrophotography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astrophotography</span></a> <a href="https://defcon.social/tags/photography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>photography</span></a> <a href="https://defcon.social/tags/science" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>science</span></a> <a href="https://defcon.social/tags/astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astronomy</span></a> <a href="https://defcon.social/tags/physics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>physics</span></a> <a href="https://defcon.social/tags/nature" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nature</span></a> <a href="https://defcon.social/tags/NASA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>NASA</span></a> <a href="https://defcon.social/tags/ESA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ESA</span></a></p>
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