Ed Wiebe<p>Fata morgana visible today, from Willows Beach in <a href="https://mstdn.ca/tags/OakBay" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>OakBay</span></a>, <a href="https://mstdn.ca/tags/VictoriaBC" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>VictoriaBC</span></a>. Cold air under warm creates a duct where there are multiple paths that light from an object can follow to your eye. The different paths result in multiple images of the same thing. In the image of the ship, it's heat haze, small pockets of convection mixing the cold and warm air, that result in a smearing of the image. It's very painterly.</p><p><a href="https://mstdn.ca/tags/AtmosphericOptics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AtmosphericOptics</span></a> <a href="https://mstdn.ca/tags/mirage" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>mirage</span></a></p>
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#atmosphericoptics
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Mark McCaughrean<p>Currently doing battle with a truculent million year old baby protostar below the belt of Orion, moving behind clouds some eighty million au away 😬</p><p>As a brief distraction, here’s a several billion year old grown-up star just one au away, playing with the water and ice in the atmosphere of one of its planets 🌞</p><p><a href="https://mastodon.social/tags/SpaceScience" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SpaceScience</span></a> ✨<br><a href="https://mastodon.social/tags/AtmosphericOptics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AtmosphericOptics</span></a> 🌈<br><a href="https://mastodon.social/tags/CloudAppreciationSociety" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>CloudAppreciationSociety</span></a> 🌥️</p>
Mark McCaughrean<p>A 54km ride this evening, half of which was along a new route 🙂</p><p>Which my ELEMNT recorded & which shows in my weekly ride total, but the ride itself has disappeared from the gizmo & did not sync to my phone or to Strava. Will have to add it manually 🙄</p><p>Only little spits of rain during the ride, but as this 22° halo & outer elliptical circumscribed halo from earlier in the day show, the weather is a changin’ 🌧️</p><p><a href="https://mastodon.social/tags/CyclingLife" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>CyclingLife</span></a> 🚴♂️<br><a href="https://mastodon.social/tags/Photography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Photography</span></a> 📷<br><a href="https://mastodon.social/tags/AtmosphericOptics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AtmosphericOptics</span></a> 🌈</p>
Benjamin Knispel<p>One additional image of the rising Moon with a pine pollen corona. It was quite easy to see with the unaided eye.</p><p>This was taken on May 12 at 22:26 CEST north of Hanover, Germany.</p><p>3.2 seconds exposed at f/6.3, ISO 640 and f=200 mm.</p><p><a href="https://chaos.social/tags/AtmosphericOptics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AtmosphericOptics</span></a> <a href="https://chaos.social/tags/Photography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Photography</span></a> <a href="https://chaos.social/tags/Light" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Light</span></a> <a href="https://chaos.social/tags/Diffraction" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Diffraction</span></a> <a href="https://chaos.social/tags/Physics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Physics</span></a> <a href="https://chaos.social/tags/Pollen" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Pollen</span></a> <a href="https://chaos.social/tags/Moon" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Moon</span></a></p>
Benjamin Knispel<p>Tree sex makes colored rings in the sky – Yesterday, I observed pollen coronas around the sun and the moon.</p><p>These colorful rings appear around the sun / the moon when airborne pollen diffracts the light (=deflects it depending on its color).</p><p>Different pollen types make different coronas. Here, it is likely pine pollen.</p><p>pic 1 at 14:08 CEST, f=200 mm, sun covered by street lamp.</p><p>pic 2 at 22:27 CEST, f=200 mm, moon overexposed</p><p><a href="https://chaos.social/tags/AtmosphericOptics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AtmosphericOptics</span></a> <a href="https://chaos.social/tags/Photography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Photography</span></a> <a href="https://chaos.social/tags/Light" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Light</span></a> <a href="https://chaos.social/tags/Diffraction" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Diffraction</span></a> <a href="https://chaos.social/tags/Physics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Physics</span></a></p>
Benjamin Knispel<p>Very nice pollen based atmospheric optics.</p><p>Last night I observed a pollen corona around the bright moon. These colored rings around the moon are created when its light is refracted by airborne pollen.</p><p>Depending on the type of pollen, different ring shapes and sizes appear. This one is probably from pine pollen.</p><p>Image: 22:53 CEST | f=300 mm | aperture 5.6 | ISO 1250 | 0.5 s</p><p><a href="https://chaos.social/tags/AtmosphericOptics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AtmosphericOptics</span></a> <a href="https://chaos.social/tags/Photography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Photography</span></a> <a href="https://chaos.social/tags/Nature" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Nature</span></a> <a href="https://chaos.social/tags/Light" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Light</span></a> <a href="https://chaos.social/tags/Diffraction" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Diffraction</span></a> <a href="https://chaos.social/tags/Moon" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Moon</span></a></p>
Benjamin Knispel<p>Venus, the crescent moon and Mercury were accompanied by a beautiful purple light (<a href="https://en.wikipedia.org/wiki/Afterglow" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">en.wikipedia.org/wiki/Afterglo</span><span class="invisible">w</span></a>) at dusk today.</p><p>The purple light disappeared relatively quickly as the sun sanke deeper below the horizon. There are just 6 minutes between the two pictures.</p><p><a href="https://chaos.social/tags/PurpleLight" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>PurpleLight</span></a> <a href="https://chaos.social/tags/Moon" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Moon</span></a> <a href="https://chaos.social/tags/Venus" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Venus</span></a> <a href="https://chaos.social/tags/Mercury" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Mercury</span></a> <a href="https://chaos.social/tags/AtmosphericOptics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AtmosphericOptics</span></a> <a href="https://chaos.social/tags/astrophotography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astrophotography</span></a> <a href="https://chaos.social/tags/astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astronomy</span></a></p>
Mark McCaughrean<p>Not something you see every day 😱</p><p>Anti-crepuscular rays above & below the eastern horizon, converging on the anti-solar point at the end of the shadow being cast by an airplane’s contrail. </p><p>Cast by clouds on the other horizon near sunset, these rays are actually parallel, but perspective makes them converge like railway lines.</p><p>Normally they’re only see above the horizon for obvious reasons 😉</p><p>As seen from LH754 en-route to Bengaluru last night ✈️</p><p><a href="https://mastodon.social/tags/Photography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Photography</span></a> 📷<br><a href="https://mastodon.social/tags/AtmosphericOptics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AtmosphericOptics</span></a> 🌄</p>
Mark McCaughrean<p>And forty minutes later, the fog had cleared leaving some light cloud, making for some lovely iridescence as the sun set behind the Königstuhl, as seen from a walk in the woods above Ziegelhausen.</p><p><a href="https://mastodon.social/tags/Germany" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Germany</span></a> 🇩🇪<br><a href="https://mastodon.social/tags/Heidelberg" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Heidelberg</span></a> 🏰<br><a href="https://mastodon.social/tags/Photography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Photography</span></a> 📷<br><a href="https://mastodon.social/tags/AtmosphericOptics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AtmosphericOptics</span></a> 🌈</p>
Elio Campitelli<p>Ok, Mastodon, do your thing. Does anyone know what happened with atoptics.co.uk? It used to be this gorgeous website with lovely explanations about optical phenomena in the atmosphere and an "atmospheric optics picture of the day" to which I subscribed. Now all of it its gone and the only thing left is a plain and boring-looking blog with almost no pictures and ai-feeling text that hasn't been updated in a year. </p><p>Please boost!</p><p><a href="https://mastodon.social/tags/AtmosphericOptics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AtmosphericOptics</span></a> <a href="https://mastodon.social/tags/Optics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Optics</span></a> <a href="https://mastodon.social/tags/Photography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Photography</span></a></p>
Mark McCaughrean<p>After days of cold, wet, & snowy absence, the Sun had the cheek to reappear today wearing a halo, as if it had done nothing wrong 🌞🤷♂️</p><p><a href="https://mastodon.social/tags/Heidelberg" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Heidelberg</span></a> 🏰<br><a href="https://mastodon.social/tags/Photography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Photography</span></a> 📷<br><a href="https://mastodon.social/tags/AtmosphericOptics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AtmosphericOptics</span></a> 🌈</p>
Dr. John Barentine FRAS<p>I've added some information toward the end of the page on my website about my work with night-sky brightness measurement and monitoring specifically regarding how dust and smoke suspended in the lower atmosphere affects the readings we get.</p><p><a href="https://www.johncbarentine.com/night-sky-photometers.html" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">johncbarentine.com/night-sky-p</span><span class="invisible">hotometers.html</span></a></p><p><a href="https://astrodon.social/tags/LightPollution" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>LightPollution</span></a> <a href="https://astrodon.social/tags/DarkSkies" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>DarkSkies</span></a> <a href="https://astrodon.social/tags/Aerosols" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Aerosols</span></a> <a href="https://astrodon.social/tags/AtmosphericOptics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AtmosphericOptics</span></a> <a href="https://astrodon.social/tags/SkyBrightness" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SkyBrightness</span></a></p>
Lee Petersen<p>I'm sharing some atmospheric optics photos today. This first one is known as fata morgana, or a superior mirage. This occurs when light rays bend as they pass through layers of air at different densities, causing the resulting object image to be stretched out or inverted over the horizon (often in many layers). This photo is of the Delta Mountains from Fairbanks, Alaska. Nearly 130 miles away, this part of the Alaska Range is normally barely visible from town.</p><p><a href="https://alaskan.social/tags/atmosphericoptics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>atmosphericoptics</span></a> <a href="https://alaskan.social/tags/Alaska" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Alaska</span></a> <a href="https://alaskan.social/tags/nature" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nature</span></a></p>
Mark McCaughrean<p>Morning. </p><p>A front moving from the south & promising heavy rain in about four hours brings some high clouds in too, making a nice 22° ice halo for a few minutes.</p><p>Need to get my cycle ride in before the rain comes, I think 😬🤞</p><p><a href="https://mastodon.social/tags/CyclingLife" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>CyclingLife</span></a> 🚴♂️<br><a href="https://mastodon.social/tags/Wassenaar" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Wassenaar</span></a> 🚀 (if you know, you know)<br><a href="https://mastodon.social/tags/Netherlands" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Netherlands</span></a> 🇳🇱<br><a href="https://mastodon.social/tags/Photography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Photography</span></a> 📷<br><a href="https://mastodon.social/tags/AtmosphericOptics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AtmosphericOptics</span></a> 🌈<br><a href="https://mastodon.social/tags/CloudAppreciationSociety" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>CloudAppreciationSociety</span></a> ☁️</p>
Mark McCaughrean<p>Dayglo halo 🌞</p><p>A lovely long-lasting 22° halo around the Sun due to ice in cirrus high in the sky over Wassenaar today, nicely set off by some passing low clouds 🙂👍</p><p><a href="https://mastodon.social/tags/Netherlands" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Netherlands</span></a> 🇳🇱<br><a href="https://mastodon.social/tags/Photography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Photography</span></a> 📷<br><a href="https://mastodon.social/tags/AtmosphericOptics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AtmosphericOptics</span></a> 🌈<br><a href="https://mastodon.social/tags/CloudAppreciationSociety" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>CloudAppreciationSociety</span></a> ⛅️</p>
Lee Petersen<p>A Sun pillar appears shortly after sunset in the Goldstream Valley of Fairbanks, Alaska. Formed similarly to light pillars (from artificial lights), this atmospheric phenomenon is due to the reflection of sunlight off of plate-like ice crystals aligned horizontally high in the atmosphere.</p><p>More of my atmospheric optics photos: <a href="https://photos.lwpetersen.com/Galleries/Atmospheric-Optics/Atoptics" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">photos.lwpetersen.com/Gallerie</span><span class="invisible">s/Atmospheric-Optics/Atoptics</span></a></p><p><a href="https://alaskan.social/tags/Alaska" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Alaska</span></a> <a href="https://alaskan.social/tags/AtmosphericOptics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AtmosphericOptics</span></a></p>
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