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Cosmic LogA cousin for Pluto? New dwarf planet candidate found Astrophysicists say they've identified an object beyond the orbit of Neptune that's likely to qualify as a dwarf planet, alongside other trans-Neptunian objects including Pluto, the erstwhile "ninth planet."The discovery of 2017 OF201 touches upon another ninth-planet contr <a href="https://cosmiclog.com/2025/05/22/a-cousin-for-pluto-new-dwarf-planet-candidate-found/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://cosmiclog.com/2025/05/22/a-cousin-for-pluto-new-dwarf-planet-candidate-found/</a> <a href="https://mastodon.online/tags/CosmicSpace" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#CosmicSpace</a> <a href="https://mastodon.online/tags/Astronomy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Astronomy</a> <a href="https://mastodon.online/tags/DwarfPlanets" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#DwarfPlanets</a> <a href="https://mastodon.online/tags/PlanetNine" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#PlanetNine</a> <a href="https://mastodon.online/tags/PlanetX" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#PlanetX</a> <a href="https://mastodon.online/tags/planets" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#planets</a> <a href="https://mastodon.online/tags/Space" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Space</a>

Useless Facts, Badly DrawnUseless Facts, Badly Drawn #423: Quaoar. . . <a href="https://mastodon.social/tags/quaoar" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#quaoar</a> <a href="https://mastodon.social/tags/dwarfplanets" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#dwarfplanets</a> <a href="https://mastodon.social/tags/astronomy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#astronomy</a> <a href="https://mastodon.social/tags/space" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#space</a> <a href="https://mastodon.social/tags/strangebuttrue" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#strangebuttrue</a> <a href="https://mastodon.social/tags/weirdplanets" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#weirdplanets</a> <a href="https://mastodon.social/tags/planets" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#planets</a> <a href="https://mastodon.social/tags/solarsystem" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#solarsystem</a> <a href="https://mastodon.social/tags/strangenewworlds" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#strangenewworlds</a> <a href="https://mastodon.social/tags/pluto" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#pluto</a> <a href="https://mastodon.social/tags/neptune" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#neptune</a> <a href="https://mastodon.social/tags/weywot" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#weywot</a> <a href="https://mastodon.social/tags/funfacts" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#funfacts</a> <a href="https://mastodon.social/tags/facts" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#facts</a> <a href="https://mastodon.social/tags/didyouknow" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#didyouknow</a> <a href="https://mastodon.social/tags/comics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#comics</a> <a href="https://mastodon.social/tags/webcomics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#webcomics</a> <a href="https://mastodon.social/tags/uselessfacts" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#uselessfacts</a> <a href="https://mastodon.social/tags/uselessfactsbadlydrawn" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#uselessfactsbadlydrawn</a>

Alan BoyleHow did <a href="https://mastodon.social/tags/Pluto" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Pluto</a> get its heart? Scientists say it involved a cosmic "splat." (Yes, that's the scientific term.) The newly published study is a nice follow-up to my book about the little guy, "The Case for Pluto." <a href="https://cosmiclog.com/2024/04/15/how-did-pluto-get-its-heart-scientists-suggest-an-answer/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://cosmiclog.com/2024/04/15/how-did-pluto-get-its-heart-scientists-suggest-an-answer/</a> <a href="https://mastodon.social/tags/Space" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Space</a> <a href="https://mastodon.social/tags/DwarfPlanets" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#DwarfPlanets</a>

Cosmic LogHow did Pluto get its heart? Scientists suggest an answer The most recognizable feature on Pluto is its “heart,” a relatively bright valentine-shaped area known as Tombaugh Regio. How that heart got started is one of the dwarf planet’s deepest mysteries — but now researchers say they’ve come up with the most likely scena <a href="https://cosmiclog.com/2024/04/15/how-did-pluto-get-its-heart-scientists-suggest-an-answer/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://cosmiclog.com/2024/04/15/how-did-pluto-get-its-heart-scientists-suggest-an-answer/</a> <a href="https://mastodon.online/tags/UniverseToday" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#UniverseToday</a> <a href="https://mastodon.online/tags/Astronomy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Astronomy</a> <a href="https://mastodon.online/tags/DwarfPlanets" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#DwarfPlanets</a> <a href="https://mastodon.online/tags/KuiperBelt" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#KuiperBelt</a> <a href="https://mastodon.online/tags/NewHorizons" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#NewHorizons</a> <a href="https://mastodon.online/tags/Pluto" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Pluto</a> <a href="https://mastodon.online/tags/Space" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Space</a>

Matt WillemsenEven Eris and Makemake Could Have Geothermal Activity <a href="https://www.universetoday.com/165777/even-eris-and-makemake-could-have-geothermal-activity/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://www.universetoday.com/165777/even-eris-and-makemake-could-have-geothermal-activity/</a> <a href="https://mastodon.social/tags/astronomy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#astronomy</a> <a href="https://mastodon.social/tags/DwarfPlanets" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#DwarfPlanets</a> <a href="https://mastodon.social/tags/geothermal" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#geothermal</a> <a href="https://mastodon.social/tags/pluto" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#pluto</a> <a href="https://mastodon.social/tags/Eris" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Eris</a> <a href="https://mastodon.social/tags/Makemake" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Makemake</a> <a href="https://mastodon.social/tags/methane" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#methane</a>

Alan Boyle<a href="https://mastodon.social/tags/Eris" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Eris</a> and <a href="https://mastodon.social/tags/Makemake" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Makemake</a> may be dwarf planets, but they're not dead planets: Scientists analyzed data from NASA's James Webb Space Telescope and found evidence pointing to geothermal activity deep within those mini-worlds. <a href="https://cosmiclog.com/2024/02/16/webb-telescope-detects-activity-within-dwarf-planets/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://cosmiclog.com/2024/02/16/webb-telescope-detects-activity-within-dwarf-planets/</a> <a href="https://mastodon.social/tags/Space" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Space</a> <a href="https://mastodon.social/tags/JWST" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#JWST</a> <a href="https://mastodon.social/tags/DwarfPlanets" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#DwarfPlanets</a> <a href="https://mastodon.social/tags/Planets" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Planets</a>

Daniel Pomarède🚨 News from the Kuiper BeltSwRI scientists find evidence of geothermal processes producing methane from within icy dwarf planets Eris and Makemake➡️ press release <a href="https://swri.org/press-release/swri-scientists-find-evidence-of-geothermal-activity-within-icy-dwarf-planets" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://swri.org/press-release/swri-scientists-find-evidence-of-geothermal-activity-within-icy-dwarf-planets</a>➡️ Icarus paper <a href="https://doi.org/10.1016/j.icarus.2024.115999" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://doi.org/10.1016/j.icarus.2024.115999</a> <a href="https://mastodon.social/tags/MakeMake" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#MakeMake</a> <a href="https://mastodon.social/tags/Eris" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Eris</a> <a href="https://mastodon.social/tags/dwarfplanets" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#dwarfplanets</a> <a href="https://mastodon.social/tags/KuiperBelt" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#KuiperBelt</a> <a href="https://mastodon.social/tags/KBO" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#KBO</a> <a href="https://mastodon.social/tags/KuiperBeltObjects" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#KuiperBeltObjects</a> <a href="https://mastodon.social/tags/TNO" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#TNO</a> <a href="https://mastodon.social/tags/TransNeptunianObjects" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#TransNeptunianObjects</a> <a href="https://mastodon.social/tags/icyworlds" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#icyworlds</a> <a href="https://mastodon.social/tags/methane" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#methane</a> <a href="https://mastodon.social/tags/volatiles" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#volatiles</a> <a href="https://mastodon.social/tags/molecules" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#molecules</a> <a href="https://mastodon.social/tags/geochemistry" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#geochemistry</a> <a href="https://mastodon.social/tags/cosmochemistry" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cosmochemistry</a> <a href="https://mastodon.social/tags/astrobiology" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#astrobiology</a> <a href="https://mastodon.social/tags/life" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#life</a> <a href="https://mastodon.social/tags/planetary" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#planetary</a> <a href="https://mastodon.social/tags/science" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#science</a> <a href="https://mastodon.social/tags/JWST" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#JWST</a> <a href="https://mastodon.social/tags/SolarSystem" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#SolarSystem</a> <a href="https://mastodon.social/tags/SwRI" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#SwRI</a> <a href="https://mastodon.social/tags/IcarusJournal" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#IcarusJournal</a> <a href="https://mastodon.social/tags/astronomy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#astronomy</a> <a href="https://mastodon.social/tags/astrodon" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#astrodon</a>

Julie HowlinEris may be larger than Pluto (we can't be sure as it's apparently very difficult to get an accurate measure of how big such distant planets actually are) and it was initially described as the tenth planet. It was the discovery of Eris that first sparked the debate over the definition of a planet, which led to Pluto being demoted to "dwarf planet" along with Eris.10 things you might not know about Eris:<a href="https://topicaltens.blogspot.com/2015/01/5th-january-dwarf-planet-eris.html" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://topicaltens.blogspot.com/2015/01/5th-january-dwarf-planet-eris.html</a><a href="https://mastodon.social/tags/Eris" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Eris</a> <a href="https://mastodon.social/tags/Space" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Space</a> <a href="https://mastodon.social/tags/Planets" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Planets</a> <a href="https://mastodon.social/tags/DwarfPlanets" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#DwarfPlanets</a>

Soh Kam YungCool images and scientific speculation of what we can currently determine of the other side of Pluto (only seen in low resolution and not captured during the actual flyby).<a href="https://www.nature.com/immersive/d41586-020-02082-1/index.html" rel="nofollow noopener noreferrer" target="_blank">https://www.nature.com/immersive/d41586-020-02082-1/index.html</a><a href="https://mstdn.io/tags/DwarfPlanets" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#DwarfPlanets</a> <a href="https://mstdn.io/tags/Pluto" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Pluto</a> <a href="https://mstdn.io/tags/NewHorizons" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#NewHorizons</a> <a href="https://mstdn.io/tags/Space" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Space</a> <a href="https://mstdn.io/tags/Astronomy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Astronomy</a>

Soh Kam YungPhil Plait gives us a look at how the other side of Pluto looks like."In a recently published paper, the planetary scientists on the New Horizons team described these images and what they may be saying about the semi-frozen rock-and-ice world at the edge of the solar system."<a href="https://www.syfy.com/syfywire/plutos-far-side-exploring-the-backside-of-a-tiny-iceworld" rel="nofollow noopener noreferrer" target="_blank">https://www.syfy.com/syfywire/plutos-far-side-exploring-the-backside-of-a-tiny-iceworld</a><a href="https://octodon.social/@evilscientistca" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@evilscientistca</a> <a href="https://mstdn.io/tags/Science" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Science</a> <a href="https://mstdn.io/tags/DwarfPlanets" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#DwarfPlanets</a> <a href="https://mstdn.io/tags/Pluto" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Pluto</a> <a href="https://mstdn.io/tags/NewHorizons" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#NewHorizons</a>

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