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Science | The GuardianStarwatch: Prepare for a pre-dawn Venus at its peak <a href="https://www.theguardian.com/science/2025/aug/04/starwatch-prepare-for-a-pre-dawn-venus-at-its-peak" rel="nofollow noopener" translate="no" target="_blank">https://www.theguardian.com/science/2025/aug/04/starwatch-prepare-for-a-pre-dawn-venus-at-its-peak</a> <a href="https://halo.nu/tags/Astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#Astronomy</a> <a href="https://halo.nu/tags/Science" class="mention hashtag" rel="nofollow noopener" target="_blank">#Science</a> <a href="https://halo.nu/tags/Venus" class="mention hashtag" rel="nofollow noopener" target="_blank">#Venus</a> <a href="https://halo.nu/tags/Space" class="mention hashtag" rel="nofollow noopener" target="_blank">#Space</a>

Corey S PowellEn route to Jupiter, NASA's Europa Clipper captured this ethereal thermal (infrared) image of Mars and its two tiny moons.We still don't know if they are captured asteroids, or the splattered remains of ancient impacts. <a href="https://photojournal.jpl.nasa.gov/catalog/PIA26567" rel="nofollow noopener" translate="no" target="_blank">https://photojournal.jpl.nasa.gov/catalog/PIA26567</a> <a href="https://mastodon.social/tags/space" class="mention hashtag" rel="nofollow noopener" target="_blank">#space</a> <a href="https://mastodon.social/tags/science" class="mention hashtag" rel="nofollow noopener" target="_blank">#science</a> <a href="https://mastodon.social/tags/astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#astronomy</a>

Bits of PlutoA bit of Pluto <a href="https://mastodon.cesium.pw/tags/pluto" class="mention hashtag" rel="nofollow noopener" target="_blank">#pluto</a> <a href="https://mastodon.cesium.pw/tags/nasa" class="mention hashtag" rel="nofollow noopener" target="_blank">#nasa</a> <a href="https://mastodon.cesium.pw/tags/space" class="mention hashtag" rel="nofollow noopener" target="_blank">#space</a> <a href="https://mastodon.cesium.pw/tags/astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#astronomy</a> <a href="https://mastodon.cesium.pw/tags/science" class="mention hashtag" rel="nofollow noopener" target="_blank">#science</a> <a href="https://mastodon.cesium.pw/tags/plutopics" class="mention hashtag" rel="nofollow noopener" target="_blank">#plutopics</a>

Warrick BallThe Journal of Open Source Software ( <a href="https://fosstodon.org/@joss" class="u-url mention" rel="nofollow noopener" target="_blank">@joss</a> ) is once again looking to recruit editors. If you have experience of open source software in a research domain, consider applying at the link on the JOSS blog until Sep 15:<a href="https://blog.joss.theoj.org/2025/08/call-for-editors" rel="nofollow noopener" translate="no" target="_blank">https://blog.joss.theoj.org/2025/08/call-for-editors</a>That links to more information about the role, too.I've been the associate editor-in-chief for <a href="https://mas.to/tags/astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#astronomy</a>, astrophysics and space science since the end of 2024 and was an editor myself for about two years before that.

Khurram Wadee ✅<a href="https://mastodon.org.uk/tags/BlueArcs" class="mention hashtag" rel="nofollow noopener" target="_blank">#BlueArcs</a> Toward <a href="https://mastodon.org.uk/tags/Andromeda" class="mention hashtag" rel="nofollow noopener" target="_blank">#Andromeda</a> <a href="https://mastodon.org.uk/tags/Astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#Astronomy</a> <a href="https://mastodon.org.uk/tags/Picture" class="mention hashtag" rel="nofollow noopener" target="_blank">#Picture</a> of the Day<a href="https://apod.nasa.gov/apod/ap250804.html" rel="nofollow noopener" translate="no" target="_blank">https://apod.nasa.gov/apod/ap250804.html</a><a href="https://mastodon.org.uk/tags/APOD" class="mention hashtag" rel="nofollow noopener" target="_blank">#APOD</a>

MPI for Gravitational PhysicsLess than three weeks left! On 23 August the 10th Open Day at our gravitational-wave detector GEO600 will take place.ℹ️ <a href="https://www.geo600.org/openday2025" rel="nofollow noopener" translate="no" target="_blank">https://www.geo600.org/openday2025</a>Just drop by GEO600 south of Hanover, Germany, between 12:00 and 16:00 CEST, talk to our researchers, and get insights into a cutting-edge research facility.This year, there will also be an information booth for the distributed computing project <a href="https://academiccloud.social/@einsteinathome" class="u-url mention" rel="nofollow noopener" target="_blank">@einsteinathome</a>.<a href="https://academiccloud.social/tags/SciComm" class="mention hashtag" rel="nofollow noopener" target="_blank">#SciComm</a> <a href="https://academiccloud.social/tags/Astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#Astronomy</a> <a href="https://academiccloud.social/tags/GravitationalWaves" class="mention hashtag" rel="nofollow noopener" target="_blank">#GravitationalWaves</a> <a href="https://academiccloud.social/tags/Hanover" class="mention hashtag" rel="nofollow noopener" target="_blank">#Hanover</a>

Astronomy Picture of the DayAPOD from 2025-08-04Blue Arcs Toward AndromedaAmateur astronomers discovered blue arcs, SDSO 1, near Andromeda in 2022. Initially mysterious, over 550 hours of study revealed they're a new class of planetary <a href="https://mastodon.bot/tags/nebula" class="mention hashtag" rel="nofollow noopener" target="_blank">#nebula</a> within our <a href="https://mastodon.bot/tags/galaxy" class="mention hashtag" rel="nofollow noopener" target="_blank">#galaxy</a>, not intergalactic. Dubbed Ghost Planetary Nebulae (GPN), SDSO 1 is the first of this subclass, marked by faint oxygen and hydrogen emissions indicating age.HD image at <a href="https://apod.nasa.gov/apod/ap250804.html#space" rel="nofollow noopener" target="_blank">https://apod.nasa.gov/apod/ap250804.html#space</a> <a href="https://mastodon.bot/tags/astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#astronomy</a>

ESOA team of astronomers have used ALMA to observe the supergiant star DFK 52, and found a cloud of ejected material 1.4 light-years across! ⁠ DFK 52 is around 10-15 times more massive than the Sun. About 4000 years ago it went through an episode of extreme mass shedding, and then slowed down to its current rate.⁠ It has already lost 5-10% of its mass, for reasons still unkown 🤔⁠<a href="https://www.eso.org/public/images/potw2531a/" rel="nofollow noopener" translate="no" target="_blank">https://www.eso.org/public/images/potw2531a/</a>📷 ALMA(ESO/NAOJ/NRAO)/M. Siebert et al.<a href="https://mastodon.social/tags/astrodon" class="mention hashtag" rel="nofollow noopener" target="_blank">#astrodon</a> <a href="https://mastodon.social/tags/astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#astronomy</a> <a href="https://mastodon.social/tags/astrophysics" class="mention hashtag" rel="nofollow noopener" target="_blank">#astrophysics</a> <a href="https://mastodon.social/tags/space" class="mention hashtag" rel="nofollow noopener" target="_blank">#space</a> <a href="https://mastodon.social/tags/science" class="mention hashtag" rel="nofollow noopener" target="_blank">#science</a> ⁠

Jack C.MStarwatch: Prepare for a pre-dawn Venus at its peak. Via @guardian <a class="hashtag" rel="nofollow noopener" href="https://bsky.app/search?q=%23SkyWatchers" target="_blank">#SkyWatchers</a> 🌃✨🌠 <a class="hashtag" rel="nofollow noopener" href="https://bsky.app/search?q=%23Space" target="_blank">#Space</a> <a class="hashtag" rel="nofollow noopener" href="https://bsky.app/search?q=%23Astrophysics" target="_blank">#Astrophysics</a> <a class="hashtag" rel="nofollow noopener" href="https://bsky.app/search?q=%23OrbitalMechanics" target="_blank">#OrbitalMechanics</a> <a class="hashtag" rel="nofollow noopener" href="https://bsky.app/search?q=%23Astronomy" target="_blank">#Astronomy</a> 🚀 🌌 ☄️ 🛰️ <a href="https://www.theguardian.com/science/2025/aug/04/starwatch-prepare-for-a-pre-dawn-venus-at-its-peak" rel="nofollow noopener" target="_blank">Starwatch: Prepare for a pre-d...</a>

threelonmusketeersWebb reveals structures in planetary nebula, sheds new light on the Hubble Ultra Deep Field - NASASpaceFlight.com <a href="https://sh.itjust.works/post/43398561" rel="nofollow noopener" translate="no" target="_blank">https://sh.itjust.works/post/43398561</a>

The-14The hunt for ‘planet nine’: why there could still be something massive at the edge of the Solar System <a href="https://mastodon.world/tags/Astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#Astronomy</a> <a href="https://mastodon.world/tags/Pluto" class="mention hashtag" rel="nofollow noopener" target="_blank">#Pluto</a> <a href="https://mastodon.world/tags/Neptune" class="mention hashtag" rel="nofollow noopener" target="_blank">#Neptune</a> <a href="https://mastodon.world/tags/Planet9" class="mention hashtag" rel="nofollow noopener" target="_blank">#Planet9</a> <a href="https://mastodon.world/tags/SolarSystem" class="mention hashtag" rel="nofollow noopener" target="_blank">#SolarSystem</a> <a href="https://mastodon.world/tags/KuiperBelt" class="mention hashtag" rel="nofollow noopener" target="_blank">#KuiperBelt</a> <a href="https://mastodon.world/tags/SpaceDiscovery" class="mention hashtag" rel="nofollow noopener" target="_blank">#SpaceDiscovery</a> <a href="https://mastodon.world/tags/PlanetX" class="mention hashtag" rel="nofollow noopener" target="_blank">#PlanetX</a> <a href="https://mastodon.world/tags/OuterSpace" class="mention hashtag" rel="nofollow noopener" target="_blank">#OuterSpace</a> <a href="https://mastodon.world/tags/Astrophysics" class="mention hashtag" rel="nofollow noopener" target="_blank">#Astrophysics</a> <a href="https://mastodon.world/tags/NASA" class="mention hashtag" rel="nofollow noopener" target="_blank">#NASA</a> <a href="https://mastodon.world/tags/Sednoid" class="mention hashtag" rel="nofollow noopener" target="_blank">#Sednoid</a> <a href="https://mastodon.world/tags/SpaceExploration" class="mention hashtag" rel="nofollow noopener" target="_blank">#SpaceExploration</a> <a href="https://the-14.com/the-hunt-for-planet-nine-why-there-could-still-be-something-massive-at-the-edge-of-the-solar-system/" rel="nofollow noopener" translate="no" target="_blank">https://the-14.com/the-hunt-for-planet-nine-why-there-could-still-be-something-massive-at-the-edge-of-the-solar-system/</a>

Jack C.MJWST Uncovers Mysteries of a Huge Spiral Star Apep. Via @whatdamath <a class="hashtag" rel="nofollow noopener" href="https://bsky.app/search?q=%23Space" target="_blank">#Space</a> <a class="hashtag" rel="nofollow noopener" href="https://bsky.app/search?q=%23Astrophysics" target="_blank">#Astrophysics</a> <a class="hashtag" rel="nofollow noopener" href="https://bsky.app/search?q=%23OrbitalMechanics" target="_blank">#OrbitalMechanics</a> <a class="hashtag" rel="nofollow noopener" href="https://bsky.app/search?q=%23Astronomy" target="_blank">#Astronomy</a> <a class="hashtag" rel="nofollow noopener" href="https://bsky.app/search?q=%23JWST" target="_blank">#JWST</a> 🚀 🌌 ☄️ 🛰️ <a href="https://youtu.be/gumi4SZZl_Y?si=HIsjmiMoXfGfiC2J" rel="nofollow noopener" target="_blank">JWST Uncovers Mysteries of a H...</a>

Jack C.MHow far can the most powerful telescope see into space? Via @live_science <a class="hashtag" rel="nofollow noopener" href="https://bsky.app/search?q=%23Space" target="_blank">#Space</a> <a class="hashtag" rel="nofollow noopener" href="https://bsky.app/search?q=%23Astrophysics" target="_blank">#Astrophysics</a> <a class="hashtag" rel="nofollow noopener" href="https://bsky.app/search?q=%23OrbitalMechanics" target="_blank">#OrbitalMechanics</a> <a class="hashtag" rel="nofollow noopener" href="https://bsky.app/search?q=%23Astronomy" target="_blank">#Astronomy</a> <a class="hashtag" rel="nofollow noopener" href="https://bsky.app/search?q=%23JWST" target="_blank">#JWST</a> <a class="hashtag" rel="nofollow noopener" href="https://bsky.app/search?q=%23Hubble" target="_blank">#Hubble</a> 🚀 🌌 ☄️ 🛰️ <a href="https://www.livescience.com/space/how-far-can-the-most-powerful-telescope-see-into-space" rel="nofollow noopener" target="_blank">How far can the most powerful ...</a>

MalloryPosting the previous pic inspired me to finally finish a project I had started a while ago, which is the pic I got of the Omega/Swan Nebula (M17, left) and the Eagle Nebula (M16, right) in narrowband. I decided to experiment with a different palette again (HOS) and damn does it look cool 😍 Reminder, HOS narrowband means: - Red = hydrogen - Green = oxygen - Blue = sulphur Details: - FMA180pro - ASI294MM - Optolong 3nm SHO filter set - 20x180s H - 22x180s O - 31x180s S - Bortle 4 <a href="https://pixelfed.social/discover/tags/astronomy?src=hash" class="u-url hashtag" rel="nofollow noopener" target="_blank">#astronomy</a> <a href="https://pixelfed.social/discover/tags/astrophotography?src=hash" class="u-url hashtag" rel="nofollow noopener" target="_blank">#astrophotography</a>

Jack C.M‘Democratizing space’ is more than just adding new players – it comes with questions around sustainability and sovereignty. Via @spacedotcom <a class="hashtag" rel="nofollow noopener" href="https://bsky.app/search?q=%23Space" target="_blank">#Space</a> <a class="hashtag" rel="nofollow noopener" href="https://bsky.app/search?q=%23Astrophysics" target="_blank">#Astrophysics</a> <a class="hashtag" rel="nofollow noopener" href="https://bsky.app/search?q=%23OrbitalMechanics" target="_blank">#OrbitalMechanics</a> <a class="hashtag" rel="nofollow noopener" href="https://bsky.app/search?q=%23Astronomy" target="_blank">#Astronomy</a> 🚀 🌌 ☄️ 🛰️ <a class="hashtag" rel="nofollow noopener" href="https://bsky.app/search?q=%23Artemis" target="_blank">#Artemis</a> <a href="https://www.space.com/space-exploration/democratizing-space-is-more-than-just-adding-new-players-it-comes-with-questions-around-sustainability-and-sovereignty" rel="nofollow noopener" target="_blank">‘Democratizing space’ is more ...</a>

MalloryBecause it was so smoky out last night and I barely got enough signal to do anything with, I decided to take some artistic liberties with the end product instead of worrying about accuracy or whatever. Behold, the Lobster Claw Nebula (SH 1-109, left), the Bubble Nebula (NGC 7635, right), and NGC 7538 (bottom) <a href="https://pixelfed.social/discover/tags/astronomy?src=hash" class="u-url hashtag" rel="nofollow noopener" target="_blank">#astronomy</a> <a href="https://pixelfed.social/discover/tags/astrophotography?src=hash" class="u-url hashtag" rel="nofollow noopener" target="_blank">#astrophotography</a>

Jack C.MSkyscraper-size spikes of methane ice may surround Pluto's equator. Via @live_science <a class="hashtag" rel="nofollow noopener" href="https://bsky.app/search?q=%23Space" target="_blank">#Space</a> <a class="hashtag" rel="nofollow noopener" href="https://bsky.app/search?q=%23Astrophysics" target="_blank">#Astrophysics</a> <a class="hashtag" rel="nofollow noopener" href="https://bsky.app/search?q=%23OrbitalMechanics" target="_blank">#OrbitalMechanics</a> <a class="hashtag" rel="nofollow noopener" href="https://bsky.app/search?q=%23Astronomy" target="_blank">#Astronomy</a> 🚀 🌌 ☄️ 🛰️ <a href="https://www.livescience.com/space/pluto/skyscraper-size-spikes-of-methane-ice-may-surround-plutos-equator" rel="nofollow noopener" target="_blank">Skyscraper-size spikes of meth...</a>

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