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#interstellar

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SETI Institute<p>We’re not alone. What are we going to do about it?</p><p>This immersive “Situation Room” experience puts you at the table with scientists, strategists, and educators to debate humanity’s next move — in real time. As 3I/ATLAS or some other interstellar object approaches Earth, you decide: respond, retreat, or do nothing?</p><p>Vote for our <a href="https://mastodon.social/tags/SXSW2026" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SXSW2026</span></a> panel: <a href="https://participate.sxsw.com/flow/sxsw/sxsw26/community-voting-sxsw/page/community-voting/session/1752013334355001BvhN" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">participate.sxsw.com/flow/sxsw</span><span class="invisible">/sxsw26/community-voting-sxsw/page/community-voting/session/1752013334355001BvhN</span></a></p><p><a href="https://mastodon.social/tags/panelpicker" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>panelpicker</span></a> <a href="https://mastodon.social/tags/sxsw" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>sxsw</span></a> <a href="https://mastodon.social/tags/seti" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>seti</span></a> <a href="https://mastodon.social/tags/arewealone" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>arewealone</span></a> <a href="https://mastodon.social/tags/interstellar" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>interstellar</span></a> <a href="https://mastodon.social/tags/comet3I" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>comet3I</span></a></p>
Pjol<p>" We are so bound by time, by its order "</p><p>Arrival opening music, visuals and monologue still gets me every time. I even think i prefer this over Interstellar </p><p><a href="https://mementomori.social/tags/Movies" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Movies</span></a> <a href="https://mementomori.social/tags/Arrival" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Arrival</span></a> <a href="https://mementomori.social/tags/Interstellar" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Interstellar</span></a></p>
Daniel Fischer<p>Hubble Space Telescope Observations of the Interstellar Interloper 3I/ATLAS: <a href="https://arxiv.org/abs/2508.02934" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">arxiv.org/abs/2508.02934</span><span class="invisible"></span></a> -&gt; As NASA Missions Study <a href="https://scicomm.xyz/tags/Interstellar" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Interstellar</span></a> Comet, Hubble Makes Size Estimate: <a href="https://science.nasa.gov/missions/hubble/as-nasa-missions-study-interstellar-comet-hubble-makes-size-estimate/" 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/as-nasa-missions-study-interstellar-comet-hubble-makes-size-estimate/</span></a> and <a href="https://www.esa.int/ESA_Multimedia/Images/2025/08/Hubble_sizes_up_rare_interstellar_comet" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">esa.int/ESA_Multimedia/Images/</span><span class="invisible">2025/08/Hubble_sizes_up_rare_interstellar_comet</span></a> (which is 5.6 km &gt; nucleus diameter &gt; 320 m, so we still don't know much here).</p>
Where are we now?<p>2025-08-05 00:00:00 UTC (Delta: 2025-08-04)</p><p><a href="https://mastodon.social/tags/INTERSTELLAR" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>INTERSTELLAR</span></a> VISITOR: 3I/ATLAS</p><p>Direction: Approaching the Sun<br>Days to perihelion: 85.48 days</p><p>Relative to the Sun ☀️<br>- Distance (km): 503,035,454.40 km (-4,837,856.66 km)<br>- Distance (AU): 3.36 (-0.03)<br>- Light Travel Time: 27 minutes 58.00 seconds (-16.14 seconds)</p><p>Relative to Earth 🌎<br>- Distance (km): 412,837,501.50 km (-1,833,397.02 km)<br>- Distance (AU): 2.76 (-0.01)<br>- Light Travel Time: 22 minutes 57.12 seconds (-6.12 seconds)</p><p><a href="https://mastodon.social/tags/3IAtlas" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>3IAtlas</span></a></p>
Glyn Moody<p>Is 3I/ATLAS, the latest <a href="https://mastodon.social/tags/interstellar" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>interstellar</span></a> object, an alien spaceship? - <a href="https://boingboing.net/2025/08/04/is-3i-atlas-the-latest-interstellar-object-an-alien-spaceship.html" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">boingboing.net/2025/08/04/is-3</span><span class="invisible">i-atlas-the-latest-interstellar-object-an-alien-spaceship.html</span></a> "At this early stage of its passage through our Solar System, 3I/ATLAS, the recently discovered interstellar interloper, has displayed various anomalous characteristics, determined from photometric and astrometric observations."</p>
Where are we now?<p>2025-08-02 00:00:00 UTC (Delta: 2025-08-01)</p><p><a href="https://mastodon.social/tags/INTERSTELLAR" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>INTERSTELLAR</span></a> VISITOR: 3I/ATLAS</p><p>Direction: Approaching the Sun<br>Days to perihelion: 88.48 days</p><p>Relative to the Sun ☀️<br>- Distance (km): 517,570,164.20 km (-4,858,534.16 km)<br>- Distance (AU): 3.46 (-0.03)<br>- Light Travel Time: 28 minutes 46.48 seconds (-16.21 seconds)</p><p>Relative to Earth 🌎<br>- Distance (km): 418,557,182.03 km (-2,055,182.49 km)<br>- Distance (AU): 2.80 (-0.01)<br>- Light Travel Time: 23 minutes 16.20 seconds (-6.86 seconds)</p><p><a href="https://mastodon.social/tags/3IAtlas" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>3IAtlas</span></a></p>
Olly 👾<p>Interstellar Comet [3I/ATLAS] — Potentially the oldest Comet we have ever seen.</p><p>The newly discovered "interstellar visitor" [3I/ATLAS] can be seen shining like a rainbow-colored string of cosmic pearls in a new trippy timelapse image captured by a telescope in Hawaii….</p><p>🖇️Check my Image Description’s🖇️</p><p><a href="https://science.nasa.gov/blogs/planetary-defense/2025/07/02/nasa-discovers-interstellar-comet-moving-through-solar-system/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">science.nasa.gov/blogs/planeta</span><span class="invisible">ry-defense/2025/07/02/nasa-discovers-interstellar-comet-moving-through-solar-system/</span></a></p><p><a href="https://nerdculture.de/tags/interstellar" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>interstellar</span></a> <a href="https://nerdculture.de/tags/comet" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>comet</span></a> <a href="https://nerdculture.de/tags/3IATLAS" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>3IATLAS</span></a> <a href="https://nerdculture.de/tags/nasa" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nasa</span></a> <a href="https://nerdculture.de/tags/space" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>space</span></a> <a href="https://nerdculture.de/tags/science" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>science</span></a> <a href="https://nerdculture.de/tags/media" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>media</span></a> <a href="https://nerdculture.de/tags/tech" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>tech</span></a> <a href="https://nerdculture.de/tags/news" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>news</span></a></p>
Markus Feilner<p>Spooky. This book just fell out of my book shelf. I wasn't in the room. Noone was. <a href="https://mastodon.social/tags/interstellar" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>interstellar</span></a>?</p>
Jason William Karpf<p>I just gave a presentation on the biblical themes in Interstellar. But as the article says, still no chance of getting information or yourself back out (unless you’re Matthew McConaughey.)</p><p><span class="h-card" translate="no"><a href="https://newsmast.community/@books" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>books</span></a></span> <span class="h-card" translate="no"><a href="https://a.gup.pe/u/bookstodon" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>bookstodon</span></a></span> <span class="h-card" translate="no"><a href="https://a.gup.pe/u/religion" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>religion</span></a></span> <a href="https://mastodon.social/tags/ChristianSciFi" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ChristianSciFi</span></a> <a href="https://mastodon.social/tags/ProfessorK" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ProfessorK</span></a> <a href="https://mastodon.social/tags/secretscifinetwork" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>secretscifinetwork</span></a> <a href="https://mastodon.social/tags/amwritingSF" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>amwritingSF</span></a> <a href="https://mastodon.social/tags/sciencefiction" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>sciencefiction</span></a> <a href="https://mastodon.social/tags/space" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>space</span></a> <a href="https://mastodon.social/tags/interstellar" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>interstellar</span></a> </p><p><a href="https://www.popularmechanics.com/space/deep-space/a65487140/how-to-enter-black-hole-safely/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">popularmechanics.com/space/dee</span><span class="invisible">p-space/a65487140/how-to-enter-black-hole-safely/</span></a></p>
Hanno Rein<p>🔭☄️ By the way, the <a href="https://mastodon.social/tags/interstellar" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>interstellar</span></a> <a href="https://mastodon.social/tags/comet" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>comet</span></a> 3I/2025 N1 (ATLAS) is on my free Bright Comets <a href="https://mastodon.social/tags/iOS" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>iOS</span></a> app, in case you want to know where it is right now. Spoiler: it's still very faint at 16 mag. But it should brighten up to 12 mag by October. </p><p><a href="https://apps.apple.com/us/app/bright-comets/id1523594527" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">apps.apple.com/us/app/bright-c</span><span class="invisible">omets/id1523594527</span></a></p><p><a href="https://mastodon.social/tags/astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astronomy</span></a></p>
stephenhayes<p><a href="https://ioc.exchange/tags/FreeEnergy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>FreeEnergy</span></a> <a href="https://ioc.exchange/tags/VacuumEnergy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>VacuumEnergy</span></a> <a href="https://ioc.exchange/tags/GAIA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>GAIA</span></a> <a href="https://ioc.exchange/tags/Sustainability" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Sustainability</span></a> <a href="https://ioc.exchange/tags/Prosperity" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Prosperity</span></a> <a href="https://ioc.exchange/tags/Abundance" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Abundance</span></a> <a href="https://ioc.exchange/tags/EnginesOfCreation" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>EnginesOfCreation</span></a> <a href="https://ioc.exchange/tags/Replicators" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Replicators</span></a> <a href="https://ioc.exchange/tags/AI" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AI</span></a> <a href="https://ioc.exchange/tags/Automation" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Automation</span></a> <a href="https://ioc.exchange/tags/3DPrinting" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>3DPrinting</span></a> <a href="https://ioc.exchange/tags/NewDeal" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>NewDeal</span></a> <a href="https://ioc.exchange/tags/QuantumComputing" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>QuantumComputing</span></a> <a href="https://ioc.exchange/tags/Space" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Space</span></a> <a href="https://ioc.exchange/tags/Interstellar" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Interstellar</span></a> <a href="https://ioc.exchange/tags/Starships" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Starships</span></a> <a href="https://ioc.exchange/tags/WarpDrive" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>WarpDrive</span></a> <a href="https://ioc.exchange/tags/Aquaponics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Aquaponics</span></a> <a href="https://ioc.exchange/tags/Electrogravity" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Electrogravity</span></a> <a href="https://ioc.exchange/tags/GrandUnifiedField" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>GrandUnifiedField</span></a> <a href="https://ioc.exchange/tags/HarmonyWithNature" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>HarmonyWithNature</span></a> <a href="https://ioc.exchange/tags/Evolution" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Evolution</span></a> <a href="https://ioc.exchange/tags/TheSingularity" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>TheSingularity</span></a> <a href="https://ioc.exchange/tags/GreenNewDeal" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>GreenNewDeal</span></a> <a href="https://ioc.exchange/tags/TheVenusProject" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>TheVenusProject</span></a> <a href="https://ioc.exchange/tags/VenusProject" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>VenusProject</span></a> <a href="https://ioc.exchange/tags/SolarPunk" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SolarPunk</span></a> <a href="https://ioc.exchange/tags/ResourceBasedEconomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ResourceBasedEconomy</span></a> <a href="https://ioc.exchange/tags/ColdFusion" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ColdFusion</span></a> <a href="https://ioc.exchange/tags/ModernMonetaryTheory" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ModernMonetaryTheory</span></a> <a href="https://ioc.exchange/tags/NuclearFusion" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>NuclearFusion</span></a> <a href="https://ioc.exchange/tags/CasimirEffect" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>CasimirEffect</span></a> <a href="https://ioc.exchange/tags/Tesla" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Tesla</span></a> <a href="https://ioc.exchange/tags/MotionlessElectromagneticGenerator" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>MotionlessElectromagneticGenerator</span></a></p>
Vassil Nikolov | Васил Николов<p>3I/Atlas, possibly much older than the Solar System.</p><p>Kudos to Hopkins and Lintott for making a _prediction_ (about the composition of the object).<br>That is something that separates proper science from stamp collection, to borrow a famous quip.</p><p>Note how interstellar objects have the privilege of a single letter ("I") in their designations.</p><p><a href="https://ieji.de/tags/Astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Astronomy</span></a><br><a href="https://ieji.de/tags/Interstellar" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Interstellar</span></a></p><p>Mystery interstellar object could be oldest known comet<br>&lt;<a href="https://www.bbc.com/news/articles/cx23g5jpj9go" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">bbc.com/news/articles/cx23g5jp</span><span class="invisible">j9go</span></a>&gt;</p>
Daniel Fischer<p>A timelapse of <a href="https://scicomm.xyz/tags/interstellar" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>interstellar</span></a> comet ATLAS in the sky from the VLT: <a href="https://www.youtube.com/watch?v=IXJ221XXPvM" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">youtube.com/watch?v=IXJ221XXPv</span><span class="invisible">M</span></a>. And there are already three papers: <a href="https://arxiv.org/abs/2507.02757" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">arxiv.org/abs/2507.02757</span><span class="invisible"></span></a> (Discovery and Preliminary Characterization of a Third Interstellar Object: 3I/ATLAS), <a href="https://arxiv.org/abs/2507.05252" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">arxiv.org/abs/2507.05252</span><span class="invisible"></span></a> (Interstellar comet 3I/ATLAS: discovery and physical description) and <a href="https://arxiv.org/abs/2507.05226" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">arxiv.org/abs/2507.05226</span><span class="invisible"></span></a> (Initial VLT/MUSE spectroscopy of the interstellar object 3I/ATLAS).</p>
Francehelder :mastodon:🇧🇷<p><a href="https://mastodon.social/tags/meme" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>meme</span></a> <a href="https://mastodon.social/tags/interstellar" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>interstellar</span></a> <a href="https://mastodon.social/tags/interestelar" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>interestelar</span></a></p>
Chris Alemany🇺🇦🇨🇦🇪🇸<p>A comet the size of a small city... just passing by our neighborhood onto the next solar system in a few million years.</p><p><a href="https://mstdn.chrisalemany.ca/tags/astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astronomy</span></a> <a href="https://mstdn.chrisalemany.ca/tags/comet" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>comet</span></a> <a href="https://mstdn.chrisalemany.ca/tags/interstellar" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>interstellar</span></a><br><a href="https://www.cbc.ca/news/science/a11pl3z-discovery-interstellar-object-1.7575576" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">cbc.ca/news/science/a11pl3z-di</span><span class="invisible">scovery-interstellar-object-1.7575576</span></a></p>
Daniel Fischer<p>The <a href="https://scicomm.xyz/tags/interstellar" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>interstellar</span></a> <a href="https://scicomm.xyz/tags/comet" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>comet</span></a> <a href="https://scicomm.xyz/tags/ATLAS" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ATLAS</span></a> with a 2-meter telescope, from the AT "Deep g'-band Imaging of Interstellar Comet 3I/ATLAS from the Two-meter Twin Telescope (TTT)" <a href="https://www.astronomerstelegram.org/?read=17264" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">astronomerstelegram.org/?read=</span><span class="invisible">17264</span></a> - other observations were reported in <a href="https://www.astronomerstelegram.org/?read=17263" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">astronomerstelegram.org/?read=</span><span class="invisible">17263</span></a> ("Interstellar Interloper C/2025 N1 is Active"), and there are a short JPL video at <a href="https://www.youtube.com/watch?v=-vzafaw0t08" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">youtube.com/watch?v=-vzafaw0t0</span><span class="invisible">8</span></a> and ESA and NASA press releases in <a href="https://www.esa.int/Space_Safety/Planetary_Defence/ESA_tracks_rare_interstellar_comet" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">esa.int/Space_Safety/Planetary</span><span class="invisible">_Defence/ESA_tracks_rare_interstellar_comet</span></a> and <a href="https://science.nasa.gov/blogs/planetary-defense/2025/07/02/nasa-discovers-interstellar-comet-moving-through-solar-system/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">science.nasa.gov/blogs/planeta</span><span class="invisible">ry-defense/2025/07/02/nasa-discovers-interstellar-comet-moving-through-solar-system/</span></a></p>
Daniel Fischer<p>The third <a href="https://scicomm.xyz/tags/interstellar" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>interstellar</span></a> object - formerly known as <a href="https://scicomm.xyz/tags/A11pl3Z" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>A11pl3Z</span></a> - has just been named 3I/ATLAS: <a href="https://minorplanetcenter.net/mpec/K25/K25N12.html" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">minorplanetcenter.net/mpec/K25</span><span class="invisible">/K25N12.html</span></a> ... and also C/2025 N1 (ATLAS) as it happens to be a <a href="https://scicomm.xyz/tags/comet" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>comet</span></a> after all!</p>
Alan Boyle<p>A mysterious object known as <a href="https://mastodon.social/tags/A11pl3Z" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>A11pl3Z</span></a> appears to be only the third <a href="https://mastodon.social/tags/interstellar" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>interstellar</span></a> interloper to be detected passing through our solar system. Don't panic: This object has no chance of hitting Earth. <a href="https://cosmiclog.com/2025/07/02/scientists-suspect-theyve-found-a-third-interstellar-object/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">cosmiclog.com/2025/07/02/scien</span><span class="invisible">tists-suspect-theyve-found-a-third-interstellar-object/</span></a> <a href="https://mastodon.social/tags/Space" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Space</span></a> <a href="https://mastodon.social/tags/InterstellarObject" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>InterstellarObject</span></a></p>
Ross of Ottawa<p>It'll be interesting to watch the naming of this <a href="https://mastodon.social/tags/interstellar" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>interstellar</span></a> candidate evolve! </p><p>I'm no expert on nomenclature, but it starts out with a 'near Earth Object' tag of <a href="https://mastodon.social/tags/A11pl3Z" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>A11pl3Z</span></a> but that should change to something like 3I/2025 U1 (?) shortly if confirmed an interstellar object.</p><p>Since 1I/2017 U1 was found by a Hawaiian observatory it was given a Hawaiian name - 'Oumuamua. </p><p>This new guy was spotted by an undergrad poring over Chilean telescope data, it will presumably get a Spanish name?</p>
Ross of Ottawa<p>Digging thru the articles to see if someone mentions an eccentricity* value and I see a post that says preliminary number looks like:</p><p> e=10.4 ± 1.1!</p><p>Whew - that's probably really moving. 'Oumuamua I think was in the 1.2 region. </p><p>*An e above 1 indicates it's not carving an ellipse around our sun, but rather its hyperbolic, just barrelling thru the region.</p><p><a href="https://mastodon.social/tags/interstellar" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>interstellar</span></a> <a href="https://mastodon.social/tags/a11pl3z" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>a11pl3z</span></a></p>