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#astronomy

45 posts42 participants7 posts today
Mark McCaughrean<p>Since this morning, the NASA/ESA/CSA <a href="https://mastodon.social/tags/JWST" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>JWST</span></a> has been taking near-IR images of Sharpless 305, a star-forming region in the outer reaches of the Milky Way ✨</p><p>Below is an image taken with the ESO VLT many years ago in poor weather – the JWST images should be better 😉</p><p>When finished in a couple of hours, that'll be the last of my Guaranteed Time Observations, granted when I was selected as a member of the JWST Science Working Group in 2002 👴<br> <br>It has been a privilege 🙇‍♂️</p><p><a href="https://mastodon.social/tags/SpaceScience" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SpaceScience</span></a> <a href="https://mastodon.social/tags/Astronomy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Astronomy</span></a></p>
Josh Universe :goldverify:<p><span>Parker: The Solar System from Near the Sun<br><br></span><a href="https://www.youtube.com/embed/YW1yQt3K_YY" rel="nofollow noopener noreferrer" target="_blank">https://www.youtube.com/embed/YW1yQt3K_YY</a><span><br><br>If you watch long enough, a comet will appear. Before then, you will see our Solar System from inside the orbit of Mercury as recorded by NASA's Parker Solar Probe looping around the Sun. The video captures coronal streamers into the solar wind, a small Coronal Mass Ejection, and planets including, in order of appearance, Mercury, Venus, Saturn, Earth, Mars, and Jupiter. Between the emergence of Earth and Mars, Comet Tempel 1 appears with a distinctive tail. The continuous fleeting streaks are high energy particles from the Sun impacting Parker's sideways looking camera. The featured time-lapse video was taken last year during Encounter 21, Parker's 21st close approach to the Sun. Studying data and images from Parker are delivering a better understanding of the dynamic Sun's effects on Earth's space weather as well as humanity's power grids, spacecraft, and space-faring astronauts. Growing Gallery: Partial Solar Eclipse of 2025 March<br><br>Attribution: <br><br> </span><a href="https://lemmy.world/c/science" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@science@lemmy.world</a> <a href="https://beehaw.org/c/science" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@science@beehaw.org</a> <a href="https://beehaw.org/u/space" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@space@beehaw.org</a> <a href="https://lemmy.world/u/Space" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@space@lemmy.world</a> <a href="https://lemmy.ml/c/science" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@science@lemmy.ml</a> <a href="https://newsmast.community/@space" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@space@newsmast.community</a> <a href="https://lemmy.ml/c/space" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@space@lemmy.ml</a> <a href="https://science.social/tags/space" rel="nofollow noopener noreferrer" target="_blank">#space</a> <a href="https://science.social/tags/science" rel="nofollow noopener noreferrer" target="_blank">#science</a> <a href="https://science.social/tags/nasa" rel="nofollow noopener noreferrer" target="_blank">#nasa</a> <a href="https://science.social/tags/astronomy" rel="nofollow noopener noreferrer" target="_blank">#astronomy</a></p>
Antinous the Gay God<p>🪷 <a href="https://social.anoxinon.de/tags/Hypatia" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Hypatia</span></a> of <a href="https://social.anoxinon.de/tags/Alexandria" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Alexandria</span></a> is a saint of <a href="https://social.anoxinon.de/tags/Antinous" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Antinous</span></a> for defending Hellenistic principles even as rabid Christians stoned, flayed and immolated her in March 415 AD. Full tribute here: <a href="https://antinousstars.blogspot.com/2025/03/hypatia-of-alexandria-saint-of-antinous.html" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">antinousstars.blogspot.com/202</span><span class="invisible">5/03/hypatia-of-alexandria-saint-of-antinous.html</span></a> <a href="https://social.anoxinon.de/tags/astronomy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>astronomy</span></a> <a href="https://social.anoxinon.de/tags/history" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>history</span></a> <a href="https://social.anoxinon.de/tags/WomensHistoryMonth" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>WomensHistoryMonth</span></a>    🌔🌟📖⏳📏🔭🪷</p>
KDE<p><a href="https://floss.social/tags/KStars" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>KStars</span></a> debuts a new documentation site!</p><p>A comprehensive resource that helps you to get to know and make the most of KDE's fantastic night sky observatory and astrophotography utility.</p><p>At the moment, only English is available. More languages coming soon.</p><p><a href="https://kstars-docs.kde.org" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">kstars-docs.kde.org</span><span class="invisible"></span></a></p><p><a href="https://floss.social/tags/astronomy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>astronomy</span></a> <a href="https://floss.social/tags/astrophotography" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>astrophotography</span></a> <a href="https://floss.social/tags/nightSky" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>nightSky</span></a> <a href="https://floss.social/tags/education" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>education</span></a> <a href="https://floss.social/tags/photography" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>photography</span></a> </p><p><span class="h-card" translate="no"><a href="https://lemmy.kde.social/c/kde" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>kde@lemmy.kde.social</span></a></span></p>
ESO<p>Supermassive black hole caught playing with its food!</p><p>The supermassive black hole at the centre of galaxy NGC 4945 is swallowing huge amounts of matter. Yet, contrary to a black hole’s all-consuming reputation, our Very Large Telescope (VLT) has caught it blowing out powerful winds of material. </p><p>This cone-shaped wind is shown in red in the inset image. In fact, the wind is moving so fast that it will end up escaping the galaxy altogether, lost to the void of intergalactic space.</p><p>Read more: <a href="https://www.eso.org/public/images/potw2513a/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">eso.org/public/images/potw2513</span><span class="invisible">a/</span></a></p><p>📷 ESO/C. Marconcini et al.</p><p><a href="https://astrodon.social/tags/astrodon" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>astrodon</span></a> <a href="https://astrodon.social/tags/astronomy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>astronomy</span></a> <a href="https://astrodon.social/tags/astrophysics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>astrophysics</span></a> <a href="https://astrodon.social/tags/space" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>space</span></a> <a href="https://astrodon.social/tags/science" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>science</span></a></p>
Astronomy Picture of the Day<p>APOD from 2025-03-31</p><p>Parker: The Solar System from Near the Sun</p><p>NASA's Parker Solar Probe captured a time-lapse from inside <a href="https://mastodon.bot/tags/Mercury" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Mercury</span></a>'s orbit, showing coronal streamers, a Coronal Mass Ejection, and <a href="https://mastodon.bot/tags/planets" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>planets</span></a> like Mercury and <a href="https://mastodon.bot/tags/Venus" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Venus</span></a>. Between <a href="https://mastodon.bot/tags/Earth" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Earth</span></a> and <a href="https://mastodon.bot/tags/Mars" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Mars</span></a>, <a href="https://mastodon.bot/tags/Comet" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Comet</span></a> Tempel 1 appears. The video also shows high-energy solar particles. This data helps us understand space weather impacts on Earth.</p><p>Video at <a href="https://apod.nasa.gov/apod/ap250331.html#space" rel="nofollow noopener noreferrer" target="_blank"><span class="invisible">https://</span><span class="ellipsis">apod.nasa.gov/apod/ap250331.ht</span><span class="invisible">ml#space</span></a> <a href="https://mastodon.bot/tags/astronomy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>astronomy</span></a> <a href="https://mastodon.bot/tags/saturn" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>saturn</span></a> <a href="https://mastodon.bot/tags/jupiter" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>jupiter</span></a> <a href="https://mastodon.bot/tags/eclipse" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>eclipse</span></a></p>
Antinous the Gay God<p>🪷 <a href="https://social.anoxinon.de/tags/Hypatia" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Hypatia</span></a> of Alexandria is a saint of <a href="https://social.anoxinon.de/tags/Antinous" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Antinous</span></a> for defending Hellenistic principles as Christians stoned her to death in 415 AD. Art: Camille Flammarion, "Hypatia's Observatory at Alexandria" (L'Astronomie Populaire) 1880 <a href="https://social.anoxinon.de/tags/astronomy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>astronomy</span></a> <a href="https://social.anoxinon.de/tags/WomensHistory" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>WomensHistory</span></a> <a href="https://social.anoxinon.de/tags/philosopher" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>philosopher</span></a> 🌔🌟📖⏳📏🔭🪷</p>
The Alchemist 🇨🇦<p>A vase in honor a dying star, Eta Carinae. Ashes of Eta, a star’s demise, In Carina’s wake, light fades from the eye. Embers are scattered, stardust crowned, The light slowly dims till darkness is found. <a class="hashtag" href="https://bsky.app/search?q=%23space" rel="nofollow noopener noreferrer" target="_blank">#space</a> <a class="hashtag" href="https://bsky.app/search?q=%23sciart" rel="nofollow noopener noreferrer" target="_blank">#sciart</a> <a class="hashtag" href="https://bsky.app/search?q=%23pottery" rel="nofollow noopener noreferrer" target="_blank">#pottery</a> <a class="hashtag" href="https://bsky.app/search?q=%23star" rel="nofollow noopener noreferrer" target="_blank">#star</a> <a class="hashtag" href="https://bsky.app/search?q=%23astronomy" rel="nofollow noopener noreferrer" target="_blank">#astronomy</a></p>
Universo Mágico<p><a href="https://mastodon.online/tags/UMPlus" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>UMPlus</span></a> - Herbig-Haro 49/50</p><p><a href="https://www.universomagico.net/2025/03/herbig-haro-4950.html" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">universomagico.net/2025/03/her</span><span class="invisible">big-haro-4950.html</span></a></p><p>This image, taken by the James Webb Space Telescope, shows an energetic object called Herbig-Haro 49/50, an outflow jet from a nearby star still in the process of formation. The image is a composite of high-resolution near- and mid-infrared exposures taken with the Nircam and Miri instruments. The.....<br><a href="https://mastodon.online/tags/astronomy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>astronomy</span></a> <a href="https://mastodon.online/tags/space" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>space</span></a> <a href="https://mastodon.online/tags/astrophysics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>astrophysics</span></a> <a href="https://mastodon.online/tags/astrophotography" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>astrophotography</span></a></p>
Enrique Boeneker<p>I found out from Wikipedia that this distant object is called Sarah's Galaxy. I find this name more appropriate than the ordinary and vulgar one that people call it. Sarah's Galaxy refers to Sarah Williams, who wrote this poem that is all me now:</p><p>"Though my soul may set in darkness, it will rise in perfect light;<br>I have loved the stars too truly to be fearful of the night."<br>The Old Astronomer</p><p><a href="https://astrodon.social/tags/astronomy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>astronomy</span></a> <a href="https://astrodon.social/tags/astrophotography" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>astrophotography</span></a> <a href="https://astrodon.social/tags/Astrodon" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Astrodon</span></a> <a href="https://astrodon.social/tags/space" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>space</span></a> <a href="https://astrodon.social/tags/nightsky" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>nightsky</span></a> <a href="https://astrodon.social/tags/astrophoto" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>astrophoto</span></a> <a href="https://astrodon.social/tags/Galaxy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Galaxy</span></a> <a href="https://astrodon.social/tags/galaxies" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>galaxies</span></a> <a href="https://astrodon.social/tags/stars" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>stars</span></a> <a href="https://astrodon.social/tags/outdoors" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>outdoors</span></a> <a href="https://astrodon.social/tags/poetry" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>poetry</span></a></p>
Astronomy Picture of the Day<p>APOD from 2025-03-30</p><p>A Partial Solar <a href="https://mastodon.bot/tags/Eclipse" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Eclipse</span></a> over Iceland</p><p>Yesterday, a partial solar eclipse occurred at sunrise in parts of North America, Europe, Asia, and Africa. A striking photo from Iceland shows the Sun partially obscured by the <a href="https://mastodon.bot/tags/Moon" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Moon</span></a>, with a person seemingly pulling it out. No total eclipse was seen this time.</p><p>HD image at <a href="https://apod.nasa.gov/apod/ap250330.html#space" rel="nofollow noopener noreferrer" target="_blank"><span class="invisible">https://</span><span class="ellipsis">apod.nasa.gov/apod/ap250330.ht</span><span class="invisible">ml#space</span></a> <a href="https://mastodon.bot/tags/astronomy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>astronomy</span></a> <a href="https://mastodon.bot/tags/planet" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>planet</span></a> <a href="https://mastodon.bot/tags/earth" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>earth</span></a></p>
Marc<p>Last night of my stay, first clear night... Quick processing there's maybe more to extract from the data (M51 ~1hour, M101 ~30mn with a Skywatcher 200/1000)</p><p><a href="https://mamot.fr/tags/astronomy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>astronomy</span></a> <a href="https://mamot.fr/tags/astronomie" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>astronomie</span></a> <a href="https://mamot.fr/tags/astrophotography" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>astrophotography</span></a> <a href="https://mamot.fr/tags/SilentSunsday" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SilentSunsday</span></a> <a href="https://mamot.fr/tags/MonCielAujoudhui" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>MonCielAujoudhui</span></a></p>
Jörg Weingrill<p>Partielle Sonnenfinsternis heute am AIP in <a href="https://mastodon.berlin/tags/Potsdam" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Potsdam</span></a>. <a href="https://mastodon.berlin/tags/astronomy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>astronomy</span></a> <a href="https://mastodon.berlin/tags/astrophotography" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>astrophotography</span></a></p>
Dark*:*Star :antifa:<p><a href="https://astronomy.social/tags/Sonnenfinsternis" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Sonnenfinsternis</span></a> 29.03.2025 </p><p>Baader OD 3.8 Digital Solar Filter<br>Canon EOS 2000Da<br>WO Spacecat<br>Skywatcher AZ-EQ 6 GT</p><p>(Stack; Adobe PS, Crop)</p><p><a href="https://astronomy.social/tags/astrophotography" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>astrophotography</span></a> <a href="https://astronomy.social/tags/astronomy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>astronomy</span></a></p>
Benjamin Knispel<p>You can also see structures (mountains, rims of craters and impact basins, etc.) at the lunar limb.</p><p>There are also sunspots (and groups of them) and solar faculae on the surface of the Sun.</p><p><a href="https://chaos.social/tags/SolarEclipse" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SolarEclipse</span></a> <a href="https://chaos.social/tags/astronomy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>astronomy</span></a> <a href="https://chaos.social/tags/astrodon" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>astrodon</span></a> <a href="https://chaos.social/tags/RawTherapee" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>RawTherapee</span></a> <a href="https://chaos.social/tags/astrophotography" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>astrophotography</span></a> <a href="https://chaos.social/tags/photography" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>photography</span></a></p>
Benjamin Knispel<p>Solar eclipse from Wedemark north of Hanover, Germany, at the maximum of the eclipse (12:16&nbsp;CET) with the Moon covering 19.5% of the Sun.</p><p>Photo taken with f=600&nbsp;mm on a Canon EOS&nbsp;6D with Baader Planetarium solar filter film. Cropped image, edited with RawTherapee.</p><p><a href="https://chaos.social/tags/SolarEclipse" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SolarEclipse</span></a> <a href="https://chaos.social/tags/eclipse" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>eclipse</span></a> <a href="https://chaos.social/tags/astronomy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>astronomy</span></a> <a href="https://chaos.social/tags/astrodon" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>astrodon</span></a> <a href="https://chaos.social/tags/Hanover" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Hanover</span></a> <a href="https://chaos.social/tags/RawTherapee" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>RawTherapee</span></a> <a href="https://chaos.social/tags/astrophotography" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>astrophotography</span></a> <a href="https://chaos.social/tags/photography" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>photography</span></a></p>
Josh Universe :goldverify:<p><span>Stereo Helene<br><br></span><a href="https://apod.nasa.gov/apod/image/2503/N00172886_92_beltramini.jpg" rel="nofollow noopener noreferrer" target="_blank">https://apod.nasa.gov/apod/image/2503/N00172886_92_beltramini.jpg</a><span><br><br>Get out your red/blue glasses and float next to Helene, small, icy moon of Saturn. Appropriately named, Helene is a Trojan moon, so called because it orbits at a Lagrange point. A Lagrange point is a gravitationally stable position near two massive bodies, in this case Saturn and larger moon Dione. In fact, irregularly shaped ( about 36 by 32 by 30 kilometers) Helene orbits at Dione's leading Lagrange point while brotherly ice moon Polydeuces follows at Dione's trailing Lagrange point. The sharp stereo anaglyph was constructed from two Cassini images captured during a close flyby in 2011. It shows part of the Saturn-facing hemisphere of Helene mottled with craters and gully-like features.<br><br>Attribution: <br><br> </span><a href="https://lemmy.world/c/science" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@science@lemmy.world</a> <a href="https://beehaw.org/c/science" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@science@beehaw.org</a> <a href="https://beehaw.org/u/space" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@space@beehaw.org</a> <a href="https://lemmy.world/u/Space" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@space@lemmy.world</a> <a href="https://lemmy.ml/c/science" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@science@lemmy.ml</a> <a href="https://newsmast.community/@space" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@space@newsmast.community</a> <a href="https://lemmy.ml/c/space" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@space@lemmy.ml</a> <a href="https://science.social/tags/space" rel="nofollow noopener noreferrer" target="_blank">#space</a> <a href="https://science.social/tags/science" rel="nofollow noopener noreferrer" target="_blank">#science</a> <a href="https://science.social/tags/nasa" rel="nofollow noopener noreferrer" target="_blank">#nasa</a> <a href="https://science.social/tags/astronomy" rel="nofollow noopener noreferrer" target="_blank">#astronomy</a></p>
Astronomy Picture of the Day<p>APOD from 2025-03-29</p><p>Stereo Helene</p><p>Don your 3D glasses to view Helene, <a href="https://mastodon.bot/tags/Saturn" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Saturn</span></a>'s icy Trojan <a href="https://mastodon.bot/tags/moon" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>moon</span></a>, orbiting at Dione's stable Lagrange point. This sharp anaglyph from Cassini's 2011 flyby reveals its cratered surface.</p><p>HD image at <a href="https://apod.nasa.gov/apod/ap250329.html#space" rel="nofollow noopener noreferrer" target="_blank"><span class="invisible">https://</span><span class="ellipsis">apod.nasa.gov/apod/ap250329.ht</span><span class="invisible">ml#space</span></a> <a href="https://mastodon.bot/tags/astronomy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>astronomy</span></a></p>
Bob Tregilus<p>Hm, a new paper suggests Mars redness comes from ferrihydrite (Fe5O8H nH2O), not hematite (Fe2O3). If true, this suggests that Mars was once a water world and likely had an oxygen rich atmosphere raising the possibly of ancient life on the planet before most of its atmosphere was blown away by solar radiation.</p><p>Dr. Becky explains in this ten minute video:<br><a href="https://youtu.be/4_DsX-1-q1E?feature=shared&amp;t=166" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">youtu.be/4_DsX-1-q1E?feature=s</span><span class="invisible">hared&amp;t=166</span></a></p><p><a href="https://fosstodon.org/tags/Astronomy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Astronomy</span></a> <a href="https://fosstodon.org/tags/Mars" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Mars</span></a></p>
Risotto Bias<p>I seem to remember doing a silly post about how earth/the sun have done ~20-22 orbits around the galactic core ("the sun is old enough to drink now")</p><p>but yeah.</p><p>how many orbits will the sun have done when the milky way collides with Andromeda?</p><p><a href="https://tech.lgbt/tags/astronomy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>astronomy</span></a> <a href="https://tech.lgbt/tags/space" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>space</span></a> <a href="https://tech.lgbt/tags/milkyway" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>milkyway</span></a></p>