#Exomoon

Cette découverte à 133 années-lumière de la Terre va poser des problèmes aux scientifiques : une exolune qui pèserait 127 fois notre planète Une lune si massive qu’elle embrouillerait notre vision traditionnelle des satellites. HD 206893 B est une planète géante gazeuse située à environ 133 années-lumière de la Terre et qui représente envi...

@alcornews.bsky.social

1 month ago

Une exolune 127 × plus massive que la Terre découverte à 133 années-lumière : un vrai casse-tête pour les astronomes. #Space #Science #Astrophysics #Exomoon
media24.fr/2026/01/24/c...

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@alcornews.mastodon.social.ap.brid.gy

1 month ago

Original post on mastodon.social

Une exolune 127 × plus massive que la Terre découverte à 133 années-lumière : un vrai casse-tête pour les astronomes. #Space #Science #Astrophysics #Exomoon […]

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Hunting Exomoons With A Kilometric Baseline Interferometer - Astrobiology Despite numerous search campaigns based on a diverse set of observational techniques, exomoons

2 months ago

Hunting Exomoons With A Kilometric Baseline Interferometer
astrobiology.com/2025/12/hunt... #astrobiology #exomoon #exoplanet #astronomy

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Une exolune pourrait être super-volcanique Le premier satellite d'une planète extrasolaire - appelé aussi "exolune" - a peut-être été découvert dans le voisinage de Wasp-39b, une exoplanète de type Jupiter chaud située à 700 années-lumière de ...

@alcornews.bsky.social

2 months ago

Une exolune ultra-volcanique repérée, ce monde extrême intrigue. www.sciencesetavenir.fr/espace/unive... #Space #Astrophysics #Exomoon #JWST

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@alcornews.mastodon.social.ap.brid.gy

2 months ago

Une exolune pourrait être super-volcanique Le premier satellite d'une planète extrasolaire - appelé aussi "exolune" - a peut-être été découvert dans le voisinage de Wasp-39b, une exoplanète de type Jupiter chaud située à 700 années-lumière de la Terre.

Une exolune ultra-volcanique repérée, ce monde extrême intrigue. www.sciencesetavenir.fr/espace/univers/une-exolu... #Space #Astrophysics #Exomoon #JWST

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Orbital Stability Of Moons Around The TRAPPIST-1 Planets - Astrobiology We investigate the dynamical stability of potential satellites orbiting the seven planets of the TRAPPIST-1 system using a suite of N-body simulations

2 months ago

Orbital Stability Of Moons Around The TRAPPIST-1 Planets
astrobiology.com/2025/12/orbi... #astrobiology #exoplanet #exomoon #TRAPPIST1

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@byteandpieces.bsky.social

2 months ago

The Universe Glitched in 2025: Earth’s Secret Moon & Hawking’s Prophecy Did the universe just glitch? Because 2025 has officially been the weirdest year for astronomy on record. In this episode, we are reacting to the mind-blowing WION breakdown of the "Strangest Space Discoveries of 2025." If you thought we had the cosmos figured out, think again. From interstellar visitors to cosmic stalkers, the data from this year has completely rewritten the textbooks. Join us as we unpack the science, the theories, and the sheer existential dread of what lies in the dark void. In this episode, we cover: - ☄️ The Visitor: We discuss Comet 3i/atlas, the mysterious interstellar object that zoomed past us. Is it a rock, or is it scanning us? - 🌑 Earth’s Stalker: Turns out, we have a Quasi-Moon! We break down the discovery of the celestial body that has been trailing Earth for decades without us noticing. - 🕳️ Hawking Was Right: The terrifying merger of two Black Holes has finally confirmed Stephen Hawking’s long-standing theory. We explain what this means for the laws of physics. - 🪐 The First Exomoon: Have we finally found a moon outside our solar system? - 🌌 Cosmic Horrors: From the "Ghostly Bridge of Stars" to the largest spinning structure ever seen, we look at the anomalies that are too big for the human brain to comprehend. We break down the WION report, separate the facts from the sci-fi, and ask the big question: Are we getting closer to finding life, or just finding more ways the universe can destroy us? Hit play to get your 2025 space fix. 👇 Join the Discussion: Which discovery scares you the most? The hidden moon or the giant black hole? Subscribe/Follow for more reactions to the unknown and leave us a review if you want more space mysteries! Share this with your fellow space nerds.

📣 New Podcast! "The Universe Glitched in 2025: Earth’s Secret Moon & Hawking’s Prophecy" on @Spreaker #astronomynews #astrophysics #blackholes #cometatlas #cosmos #exomoon #futuretech #galaxy #interstellar #nasaupdates #quasimoon #reactionvideo #sciencenews #space2025 #spacemysteries #spacetime

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First Astrometric Limits On Binary Planets And Exomoons Orbiting β Pictoris b - Astrobiology The search for exomoons, or moons in other star systems

3 months ago

First Astrometric Limits On Binary Planets And Exomoons Orbiting B Pictoris b
astrobiology.com/2025/12/firs... #astrobiology #exoplanet #exomoon

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Pure Science

@purescience.news

3 months ago

Tentative Exomoon Signal in HD 206893 B Have scientists finally confirmed the existence of the first exomoon? This is what a recent study accepted for publication in Astronomy & Astrophysics hopes to address as a large international team of...

Tentative Exomoon Signal in HD 206893 B #Science #Space #Exoplanets #Exomoon #Astronomy #SpaceExploration

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Matthew Kenworthy

@mattkenworthy.bsky.social

3 months ago

A cartoon showing the star with two planets orbiting it. The outer planet/BD has a putative moon orbiting it, and there are two dust belts further out in the system.

a set of orbital fits to the residuals from the astrometric fit. They look like a set of drunk hula hoops piled on top of each other, but definitely hinting at a signal in there.

A very exciting paper by Kral et al. on “Exomoon search with VLTI/GRAVITY around the substellar companion HD 206893 B” using astrometric measurements of the companion to search for a putative #exomoon. Half a Jupiter mass at 0.22 au maaaaybe? We’re getting closer! #astrodon #astrosci #exoplanets

20 5 0 1

Pure Science

@purescience.news

5 months ago

Has JWST Finally Found an Exomoon? Data from the James Webb Space Telescope and other observatories suggests a supervolcanic exomoon may lurk around the giant exoplanet WASP-39b

Has JWST Finally Found an Exomoon? #Science #Space #Exoplanets #JWST #Exomoon #SpaceExploration

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Matthew Kenworthy

@mattkenworthy.bsky.social

5 months ago

An image of the planetary companion CT Cha b shown as a red dot next to its parent star, with a spectrum from 12 to 16 microns from JWST showing several rotational and vibrational bands in emission for several carbon molecules.

Cugno and Grant @sierragrant.bsky.social with “A Carbon-rich Disk Surrounding a Planetary-mass Companion” detected using #JWST - an impressive detection of several different carbon molecules that are very promising for #exomoon formation around the directly imaged #exoplanet CT Cha b ☄

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Astrometric Exomoon Detection By Means Of Optical Interferometry - Astrobiology With no conclusive detection to date, the search for exomoons, satellites of planets orbiting other stars, remains a formidable challenge.

5 months ago

Astrometric Exomoon Detection By Means Of Optical Interferometry
astrobiology.com/2025/09/astr... #astrobiology #exomoon #exoplanet #astronomy

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Astronomy

@astronomy.activitypub.awakari.com.ap.brid.gy

5 months ago

Awakari App

Finding Avatar’s Pandora: Exomoons with Astrometry Though moons are ubiquitous in our Solar System, we have not yet found one elsewhere (an exomoon). Today’s paper investigates whether we could...

#Daily #Paper #Summaries #astrometry #exomoon #exoplanet #simulation

Origin | Interest | Match

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K.Llewellin :coffefied:

@kllewellin.masto.ai.ap.brid.gy

6 months ago

Discovery of new moon or ring system orbiting mysterious distant planet Quaoar Astronomers have discovered what they think may be another moon orbiting a distant dwarf planet called Quaoar. This small, icy, egg-shaped planet in the far reaches of our solar system, beyond Neptune, is already known to have two rings and a moon, but this discovery was unexpected and accidental.

Discovery of new moon or ring system orbiting mysterious distant planet Quaoar phys.org/news/2025-09-discovery-m... 🪐 #Exoplanet #Exoplanets #AlienWorlds #AlienLife #Extraterrestrials #Space #Science #Exomoon

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K.Llewellin :coffefied:

@kllewellin.masto.ai.ap.brid.gy

9 months ago

How Likely Are Habitable Exo-Moons? Of the roughly 6,000 exoplanets we've discovered, a significant number are in the apparent habitable zones of their stars. Most are giant planets; either gas giants like Jupiter and Saturn, or ice giants like Uranus and Neptune. Could some of those have habitable exomoons?

How Likely Are Habitable Exo-Moons? www.universetoday.com/articles/how-likely-are-... 🪐 #Exoplanet #Exoplanets #AlienWorlds #AlienLife #Extraterrestrials #Space #Science #SolarSystem #Exomoon

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Polarimetry Of Exoplanet-Exomoon Systems - Astrobiology We investigated the potential of polarimetric observations in the optical wavelength range for the detection of exomoons and the characterization of exoplanet-exomoon systems.

11 months ago

Polarimetry Of Exoplanet-Exomoon Systems
astrobiology.com/2025/04/pola... #astrobiology #exoplanet #exomoon

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Exoplanets

@exoplanets.activitypub.awakari.com.ap.brid.gy

1 year ago

The candidate planetary system, detected with the microlensing method, is thought to move at least 540 km per second (1.2 million mph). <div class="wp-caption aligncenter" id="attachment_103105" style="width: 590px"><a href="https://cdn.sci.news/images/enlarge12/image_13656e-MOA-2011-BLG-262.jpg"><img alt="An artist’s impression of a super-Neptune exoplanet orbiting a low-mass star near the center of our Milky Way Galaxy. Image credit: NASA / JPL-Caltech / R. Hurt, Caltech-IPAC." aria-describedby="caption-attachment-103105" class="wp-image-103105 size-full" height="326" sizes="(max-width: 580px) 100vw, 580px" src="https://cdn.sci.news/images/2025/02/image_13656-MOA-2011-BLG-262.jpg" srcset="https://cdn.sci.news/images/2025/02/image_13656-MOA-2011-BLG-262.jpg 580w, https://cdn.sci.news/images/2025/02/image_13656-MOA-2011-BLG-262-300x169.jpg 300w, https://cdn.sci.news/images/2025/02/image_13656-MOA-2011-BLG-262-195x110.jpg 195w" width="580"/></a>An artist’s impression of a super-Neptune exoplanet orbiting a low-mass star near the center of our Milky Way Galaxy. Image credit: NASA / JPL-Caltech / R. Hurt, Caltech-IPAC.</div> “We think this is a so-called super-Neptune world orbiting a low-mass star at a distance that would lie between the orbits of Venus and Earth if it were in our Solar System,” said Dr. Sean Terry, a postdoctoral researcher at the University of Maryland, College Park and NASA’s Goddard Space Flight Center. “Since the star is so feeble, that’s well outside its habitable zone. If so, it will be the first planet ever found orbiting a hypervelocity star.” The system was first spotted indirectly in 2011 thanks to the microlensing event MOA-2011-BLG-262. “Microlensing occurs because the presence of mass warps the fabric of space-time,” the astronomers explained. “Any time an intervening object appears to drift near a background star, light from the star curves as it travels through the warped space-time around the nearer object.” “If the alignment is especially close, the warping around the object can act like a natural lens, amplifying the background star’s light.” In MOA-2011-BLG-262, microlensing signals revealed a pair of celestial bodies. The astronomers determined their relative masses (one is about 2,300 times heavier than the other), but their exact masses depend on how far away they are from Earth. “Determining the mass ratio is easy. It’s much more difficult to calculate their actual masses,” said Dr. David Bennett, a senior research scientist at the University of Maryland, College Park and NASA’s Goddard Space Flight Center. The MOA-2011-BLG-262 discovery team suspected the microlensed objects were either a star about 20% as massive as our Sun and a planet roughly 29 times heavier than Earth, or a nearer rogue planet about four times Jupiter’s mass with an exomoon. To figure out which explanation is more likely, Dr. Terry, Dr. Bennett and their colleagues searched through data from the Keck Observatory in Hawaii and ESA’s Gaia satellite. If the pair was a rogue exoplanet and an exomoon, they’d be effectively invisible — dark objects lost in the inky void of space. The researchers found a strong suspect located about 24,000 light-years away, putting it within the Milky Way’s Galactic bulge. By comparing the star’s location in 2011 and 2021, they calculated its high speed. But that’s just its 2D motion; if it’s also moving toward or away from us, it must be moving even faster. Its true speed may even be high enough to exceed the Galaxy’s escape velocity of 600 km per second (1.3 million mph). If so, the planetary system is destined to traverse intergalactic space many millions of years in the future. “To be certain the newly identified star is part of the system that caused the 2011 signal, we’d like to look again in another year and see if it moves the right amount and in the right direction to confirm it came from the point where we detected the signal,” Dr. Bennett said. “If high-resolution observations show that the star just stays in the same position, then we can tell for sure that it is not part of the system that caused the signal,” said Dr. Aparna Bhattacharya, also from the University of Maryland, College Park and NASA’s Goddard Space Flight Center. “That would mean the rogue planet and exomoon model is favored.” The team’s <a href="https://iopscience.iop.org/article/10.3847/1538-3881/ad9b0f/meta" rel="noopener" target="_blank">paper</a> was published this week in the Astronomical Journal. _____ Sean K. Terry et al. 2025. A Candidate High-velocity Exoplanet System in the Galactic Bulge. AJ 169, 131; doi: 10.3847/1538-3881/ad9b0f

Astronomers May Have Discovered Fastest-Moving Exoplanet System Ever Seen The candidate planetary...

www.sci.news/astronomy/fastest-moving...

#Astronomy #Bulge #ESA #Exomoon #Exoplanet #Free #floating #planet #Gaia #satellite #Gravitational

Event Attributes

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Exoplanets

@exoplanets.activitypub.awakari.com.ap.brid.gy

1 year ago

The candidate planetary system, detected with the microlensing method, is thought to move at least 540 km per second (1.2 million mph). <div class="wp-caption aligncenter" id="attachment_103105" style="width: 590px"><a href="https://cdn.sci.news/images/enlarge12/image_13656e-MOA-2011-BLG-262.jpg"><img alt="An artist’s impression of a super-Neptune exoplanet orbiting a low-mass star near the center of our Milky Way Galaxy. Image credit: NASA / JPL-Caltech / R. Hurt, Caltech-IPAC." aria-describedby="caption-attachment-103105" class="wp-image-103105 size-full" height="326" sizes="(max-width: 580px) 100vw, 580px" src="https://cdn.sci.news/images/2025/02/image_13656-MOA-2011-BLG-262.jpg" srcset="https://cdn.sci.news/images/2025/02/image_13656-MOA-2011-BLG-262.jpg 580w, https://cdn.sci.news/images/2025/02/image_13656-MOA-2011-BLG-262-300x169.jpg 300w, https://cdn.sci.news/images/2025/02/image_13656-MOA-2011-BLG-262-195x110.jpg 195w" width="580"/></a>An artist’s impression of a super-Neptune exoplanet orbiting a low-mass star near the center of our Milky Way Galaxy. Image credit: NASA / JPL-Caltech / R. Hurt, Caltech-IPAC.</div> “We think this is a so-called super-Neptune world orbiting a low-mass star at a distance that would lie between the orbits of Venus and Earth if it were in our Solar System,” said Dr. Sean Terry, a postdoctoral researcher at the University of Maryland, College Park and NASA’s Goddard Space Flight Center. “Since the star is so feeble, that’s well outside its habitable zone. If so, it will be the first planet ever found orbiting a hypervelocity star.” The system was first spotted indirectly in 2011 thanks to the microlensing event MOA-2011-BLG-262. “Microlensing occurs because the presence of mass warps the fabric of space-time,” the astronomers explained. “Any time an intervening object appears to drift near a background star, light from the star curves as it travels through the warped space-time around the nearer object.” “If the alignment is especially close, the warping around the object can act like a natural lens, amplifying the background star’s light.” In MOA-2011-BLG-262, microlensing signals revealed a pair of celestial bodies. The astronomers determined their relative masses (one is about 2,300 times heavier than the other), but their exact masses depend on how far away they are from Earth. “Determining the mass ratio is easy. It’s much more difficult to calculate their actual masses,” said Dr. David Bennett, a senior research scientist at the University of Maryland, College Park and NASA’s Goddard Space Flight Center. The MOA-2011-BLG-262 discovery team suspected the microlensed objects were either a star about 20% as massive as our Sun and a planet roughly 29 times heavier than Earth, or a nearer rogue planet about four times Jupiter’s mass with an exomoon. To figure out which explanation is more likely, Dr. Terry, Dr. Bennett and their colleagues searched through data from the Keck Observatory in Hawaii and ESA’s Gaia satellite. If the pair was a rogue exoplanet and an exomoon, they’d be effectively invisible — dark objects lost in the inky void of space. The researchers found a strong suspect located about 24,000 light-years away, putting it within the Milky Way’s Galactic bulge. By comparing the star’s location in 2011 and 2021, they calculated its high speed. But that’s just its 2D motion; if it’s also moving toward or away from us, it must be moving even faster. Its true speed may even be high enough to exceed the Galaxy’s escape velocity of 600 km per second (1.3 million mph). If so, the planetary system is destined to traverse intergalactic space many millions of years in the future. “To be certain the newly identified star is part of the system that caused the 2011 signal, we’d like to look again in another year and see if it moves the right amount and in the right direction to confirm it came from the point where we detected the signal,” Dr. Bennett said. “If high-resolution observations show that the star just stays in the same position, then we can tell for sure that it is not part of the system that caused the signal,” said Dr. Aparna Bhattacharya, also from the University of Maryland, College Park and NASA’s Goddard Space Flight Center. “That would mean the rogue planet and exomoon model is favored.” The team’s <a href="https://iopscience.iop.org/article/10.3847/1538-3881/ad9b0f/meta" rel="noopener" target="_blank">paper</a> was published this week in the Astronomical Journal. _____ Sean K. Terry et al. 2025. A Candidate High-velocity Exoplanet System in the Galactic Bulge. AJ 169, 131; doi: 10.3847/1538-3881/ad9b0f

Astronomers May Have Discovered Fastest-Moving Exoplanet System Ever Seen The candidate planetary...

www.sci.news/astronomy/fastest-moving...

#Astronomy #Bulge #ESA #Exomoon #Exoplanet #Free #floating #planet #Gaia #satellite #Gravitational

Event Attributes

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A Potential Exomoon From The Predicted Planet Obliquity Of β Pictoris b - Astrobiology Planet obliquity is the alignment or misalignment of a planet spin axis relative to its orbit normal.

1 year ago

A Potential Exomoon From The Predicted Planet Obliquity Of β Pictoris b
astrobiology.com/2024/12/a-po... #astrobiology #exoplanet #exomoon #astronomy

2 1 0 0

No7er

@no7er.bsky.social

1 year ago

Moonmoon of Molarion, Digital artwork, 2024
#art #digitalart #moon #moonmoon #submoon #exomoon #planet #planetart #exoplanet #scifi #scifiart #space #spaceart #sciencefiction #sciencefictionart #orbit #satellite #outerspace #scifiworld

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That Worldly Guy

@dullcomp.bsky.social

1 year ago

From Wobbles to Worlds - Discovery of The Exoplanet Edge! YouTube video by Cool Worlds

Cool Worlds: From Wobbles to Worlds - Discovery of The Exoplanet Edge! #astronomy #astrophysics #exoplanet #kepler #exomoon

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Norbert_R 🐘:mastodon:🦣

@norbert-renner.mastodon.social.ap.brid.gy

1 year ago

Original post on mastodon.social

#SGU #TheSkepticsGuideToTheUniverse:
The Skeptics Guide #1007 - Oct 26 2024

What's the Word: #Annular; News Items: #EuropaClipper, #Illusion of Information #Adequacy, Seeding the #Atmosphere, #Exomoon, Psychology of #Scare; Who's That Noisy; Your Questions and E-mails: Replaceable #Batteries […]

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jbz

@jbzfn.bsky.social

1 year ago

We May Have Found Our First-Ever Exomoon, Opening A New Chapter in Space Exploration After a number of false alarms, we need to act fast to figure out if this is the real deal.

🔭 We May Have Found Our First-Ever Exomoon, Opening A New Chapter in Space Exploration
— Popular Mechanics

#exomoon #exoplanets #space

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Matthias M. M. Meier

@mmmmeier.bsky.social

1 year ago

Redshifted Sodium Transient near Exoplanet Transit - IOPscienceSearchopens in new tab Redshifted Sodium Transient near Exoplanet Transit, Apurva V. Oza, Julia V. Seidel, H. Jens Hoeijmakers, Athira Unni, Aurora Y. Kesseli, Carl A. Schmidt, Thirupathi Sivarani, Aaron Bello-Arufe, Andrea...

Here's the link to the paper. #exomoon

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