Part 2 of the HR 8799 systems by Fruit.
This time we venture closer in and arrive at HR 8799 c, also named Offa.
#Astronomy #Space #Planet #SpaceArt #Moon #Worldbuilding #Speculative #Exoplanet
This time we venture closer in and arrive at HR 8799 c, also named Offa.
#Astronomy #Space #Planet #SpaceArt #Moon #Worldbuilding #Speculative #Exoplanet
September 27, 2026 at 5:03 PM
Part 2 of the HR 8799 systems by Fruit.
This time we venture closer in and arrive at HR 8799 c, also named Offa.
#Astronomy #Space #Planet #SpaceArt #Moon #Worldbuilding #Speculative #Exoplanet
This time we venture closer in and arrive at HR 8799 c, also named Offa.
#Astronomy #Space #Planet #SpaceArt #Moon #Worldbuilding #Speculative #Exoplanet
where to look for "submoons" ("moonmoons" is funnier 😛)
arxiv.org/abs/2609.03564
"Iapetus, Titan, Rhea, Phoebe, Callisto, and Ganymede are the most dynamically favorable submoon hosts"
arxiv.org/abs/2609.03564
"Iapetus, Titan, Rhea, Phoebe, Callisto, and Ganymede are the most dynamically favorable submoon hosts"
Dynamically favorable hosts for submoons around Jupiter and Saturn
The long-term stability of small bodies orbiting natural satellites (submoons) in the Solar System has been previously investigated using an analytical approximation of a three-body problem, focusing ...
arxiv.org
September 4, 2026 at 7:30 AM
where to look for "submoons" ("moonmoons" is funnier 😛)
arxiv.org/abs/2609.03564
"Iapetus, Titan, Rhea, Phoebe, Callisto, and Ganymede are the most dynamically favorable submoon hosts"
arxiv.org/abs/2609.03564
"Iapetus, Titan, Rhea, Phoebe, Callisto, and Ganymede are the most dynamically favorable submoon hosts"
The data originated from a distant planetary system. Voyager II was now in the Andromeda Galaxy!
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And there, a planet with ideal conditions for life as we know it — complete with its own moon and submoon — awaited!
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And there, a planet with ideal conditions for life as we know it — complete with its own moon and submoon — awaited!
August 18, 2026 at 5:13 PM
The data originated from a distant planetary system. Voyager II was now in the Andromeda Galaxy!
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And there, a planet with ideal conditions for life as we know it — complete with its own moon and submoon — awaited!
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And there, a planet with ideal conditions for life as we know it — complete with its own moon and submoon — awaited!
Moonmoon of Molarion, Digital artwork, 2024
#art #digitalart #planet #planetart #moon #moonart #moonmoon #submoon #space #spaceart #astronomyart #outerspace #orbit #satellite #scifi #scifiart #sciencefiction #world #alienworld
#art #digitalart #planet #planetart #moon #moonart #moonmoon #submoon #space #spaceart #astronomyart #outerspace #orbit #satellite #scifi #scifiart #sciencefiction #world #alienworld
June 27, 2026 at 3:20 PM
Moonmoon of Molarion, Digital artwork, 2024
#art #digitalart #planet #planetart #moon #moonart #moonmoon #submoon #space #spaceart #astronomyart #outerspace #orbit #satellite #scifi #scifiart #sciencefiction #world #alienworld
#art #digitalart #planet #planetart #moon #moonart #moonmoon #submoon #space #spaceart #astronomyart #outerspace #orbit #satellite #scifi #scifiart #sciencefiction #world #alienworld
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
#art #digitalart #moon #moonmoon #submoon #exomoon #planet #planetart #exoplanet #scifi #scifiart #space #spaceart #sciencefiction #sciencefictionart #orbit #satellite #outerspace #scifiworld
December 8, 2024 at 6:08 PM
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
#art #digitalart #moon #moonmoon #submoon #exomoon #planet #planetart #exoplanet #scifi #scifiart #space #spaceart #sciencefiction #sciencefictionart #orbit #satellite #outerspace #scifiworld
![The demise of the synchronous moon that gave Mars its triaxiality. The role of solar tides and a palaeo ocean
Michael Efroimsky
Mars' asymmetric figure -- with two opposing equatorial elevations -- stemmed from a frozen tidal bulge raised by a primordial synchronous moon Nerio. Nerio's emergence, through in situ formation or by capture in the disk's remnants, and its synchronisation with Mars' rotation preceded or coincided with crust formation. The submoon and antimoon regions hypothetically developed thinner crusts, intensifying tectonics that amplified Mars' triaxiality. We investigate Nerio's orbit stability and demise, and its impact on Mars' rotation. The synchronous orbit is stable transiently: solar tides adiabatically shrink it, accelerating Mars' rotation. This evolution proceeds gradually, so Mars' tidal bulge freezes. Following the LHB water delivery and ocean formation, solar tides intensify, making Nerio's synchronous orbit unstable. Nerio departs synchronism and spirals down, accelerating Mars' spin. Mars' angular velocity at the desynchronisation moment matches its present-day value to the first decimal place. This coincidence should not be overinterpreted, as post-desynchronisation evolution included Mars' continued spin-up during Nerio's descent (till Nerio's destruction amid the LHB), followed by Mars' despinning by solar tides. Nerio's reaching the Roche limit intact is questionable. Beyond LHB hazards, it would imply Mars' larger spin-up, necessitating k2/Q ~ 4.7 to allow subsequent despinning to the present-day rate. Such values may be high even for shallow oceans. Absent future evidence supporting such elevated k2/Q values, Nerio likely perished during the LHB. This viewpoint may be reconsidered should new data on Mars' palaeo ocean show up.
Subjects: Earth and Planetary Astrophysics (astro-ph.EP)
Cite as: arXiv:2604.10781 [astro-ph.EP]
(or arXiv:2604.10781v1 [astro-ph.EP] for this version)
https://doi.org/10.48550/arXiv.2604.10781](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:vsqpdbfrqt7p5p4tlssvjvop/bafkreic347jbw6y65tj5s45la4y6qjtrprczy2iwhy3dov7ttrntrmzxuu)
April 14, 2026 at 8:16 PM
Did You Know: Dibella is a moonmoon? As the Imperial Orrery shows, Dibella is a moon of Mara, who is a moon of Zenithar. This makes Dibella a moonmoon, also known as a subsatellite, moonlet, or submoon.
April 15, 2026 at 4:00 AM
Did You Know: Dibella is a moonmoon? As the Imperial Orrery shows, Dibella is a moon of Mara, who is a moon of Zenithar. This makes Dibella a moonmoon, also known as a subsatellite, moonlet, or submoon.
Did you know that moons can have moons of their own?
Astronomers think Saturn’s moon Iapetus might have had a tiny “submoon” in the distant past, but tidal forces eventually ripped it apart.
The debris may have created Iapetus’s remarkable ridge
(Image Credit: NASA/Matt McIrvin)
Astronomers think Saturn’s moon Iapetus might have had a tiny “submoon” in the distant past, but tidal forces eventually ripped it apart.
The debris may have created Iapetus’s remarkable ridge
(Image Credit: NASA/Matt McIrvin)
March 22, 2026 at 6:19 PM
Did you know that moons can have moons of their own?
Astronomers think Saturn’s moon Iapetus might have had a tiny “submoon” in the distant past, but tidal forces eventually ripped it apart.
The debris may have created Iapetus’s remarkable ridge
(Image Credit: NASA/Matt McIrvin)
Astronomers think Saturn’s moon Iapetus might have had a tiny “submoon” in the distant past, but tidal forces eventually ripped it apart.
The debris may have created Iapetus’s remarkable ridge
(Image Credit: NASA/Matt McIrvin)
It's possible for a moon orbiting a planet to have it's own moon, and the term for this is submoon or MOONMOON.
There are some exoplanets orbiting Red Dwarf stars that could have moons with stable moonmoons. They would be very rare because of complex orbital mechanics.
phys.org/news/2019-01...
There are some exoplanets orbiting Red Dwarf stars that could have moons with stable moonmoons. They would be very rare because of complex orbital mechanics.
phys.org/news/2019-01...
Where is Earth's submoon?
"Can moons have moons?"
phys.org
October 23, 2024 at 11:59 AM
It's possible for a moon orbiting a planet to have it's own moon, and the term for this is submoon or MOONMOON.
There are some exoplanets orbiting Red Dwarf stars that could have moons with stable moonmoons. They would be very rare because of complex orbital mechanics.
phys.org/news/2019-01...
There are some exoplanets orbiting Red Dwarf stars that could have moons with stable moonmoons. They would be very rare because of complex orbital mechanics.
phys.org/news/2019-01...
submoon, man, that’s where the cheese is.
November 25, 2024 at 4:45 AM
submoon, man, that’s where the cheese is.
Super Moon? Or Hyper Moon? Supra Moon? Supreme Moon? Superior Moon? Cyber Moon? SubMoon? Sonic Moon? Or Sonic Boom? Or moob? Mob? HoloMoon? Lunar Moon? Loon? HyperLoon?Looney Tunes? Moon Music? Noon? Or noun? Moun? Mountain? Mount? A unicorn? Or MonoCeres? A pony? Moonty Python? Moonty Hall?
M?R?T
M?R?T
October 16, 2025 at 1:42 PM
Super Moon? Or Hyper Moon? Supra Moon? Supreme Moon? Superior Moon? Cyber Moon? SubMoon? Sonic Moon? Or Sonic Boom? Or moob? Mob? HoloMoon? Lunar Moon? Loon? HyperLoon?Looney Tunes? Moon Music? Noon? Or noun? Moun? Mountain? Mount? A unicorn? Or MonoCeres? A pony? Moonty Python? Moonty Hall?
M?R?T
M?R?T
August 9, 2025 at 2:01 PM
I am of course back to the deep space with this beautiful new ship ! ✨
#EliteDangerous #VirtualPhotography
#EliteDangerous #VirtualPhotography
December 7, 2025 at 10:26 AM
I am of course back to the deep space with this beautiful new ship ! ✨
#EliteDangerous #VirtualPhotography
#EliteDangerous #VirtualPhotography
🚀 Moebius-style post-processing and other stylized shaders
by Maxime @MaximeHeckel
#shader #webgl #threejs #PBR #3D #ReactThreeFiber #webdev #GLSL
blog.maximeheckel.com/posts/moebiu...
by Maxime @MaximeHeckel
#shader #webgl #threejs #PBR #3D #ReactThreeFiber #webdev #GLSL
blog.maximeheckel.com/posts/moebiu...
March 26, 2024 at 4:29 PM
🚀 Moebius-style post-processing and other stylized shaders
by Maxime @MaximeHeckel
#shader #webgl #threejs #PBR #3D #ReactThreeFiber #webdev #GLSL
blog.maximeheckel.com/posts/moebiu...
by Maxime @MaximeHeckel
#shader #webgl #threejs #PBR #3D #ReactThreeFiber #webdev #GLSL
blog.maximeheckel.com/posts/moebiu...
You can call me submoon, moon-moon, or moonito if you’re not into the whole brevity thing
January 4, 2025 at 7:51 AM
You can call me submoon, moon-moon, or moonito if you’re not into the whole brevity thing
Useless Facts, Badly Drawn #421: Moonmoon.
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#moons #moonmoon #moonlet #submoon #subsatellite #space #astronomy #planets #science #sciencefacts #recursive #strangebuttrue #wtf #webcomic #comics #uselessfacts #uselessfactsbadlydrawn
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#moons #moonmoon #moonlet #submoon #subsatellite #space #astronomy #planets #science #sciencefacts #recursive #strangebuttrue #wtf #webcomic #comics #uselessfacts #uselessfactsbadlydrawn
March 31, 2025 at 3:45 PM
Useless Facts, Badly Drawn #421: Moonmoon.
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#moons #moonmoon #moonlet #submoon #subsatellite #space #astronomy #planets #science #sciencefacts #recursive #strangebuttrue #wtf #webcomic #comics #uselessfacts #uselessfactsbadlydrawn
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#moons #moonmoon #moonlet #submoon #subsatellite #space #astronomy #planets #science #sciencefacts #recursive #strangebuttrue #wtf #webcomic #comics #uselessfacts #uselessfactsbadlydrawn
The future sees other lifeforms gazing at their submoon, dreaming of possible journeys to the little satellite. Blissfully unaware, that the eventual “first step” on the submoon, was taken eons before. Just another addition in its long haphazard timeframe
(4/)
(4/)
February 3, 2025 at 2:34 AM
The future sees other lifeforms gazing at their submoon, dreaming of possible journeys to the little satellite. Blissfully unaware, that the eventual “first step” on the submoon, was taken eons before. Just another addition in its long haphazard timeframe
(4/)
(4/)
I forgot to post this! This is Elatha, a new boi who is a (very) minor god in a verse with a lot of them! He's the god of the Hound Moon, a small submoon that follows the paths of his twin Aunts' Dancer moons, and is also the god of unseen paths. His name is Elatha, and is a sweeheart
October 12, 2023 at 5:26 PM
I forgot to post this! This is Elatha, a new boi who is a (very) minor god in a verse with a lot of them! He's the god of the Hound Moon, a small submoon that follows the paths of his twin Aunts' Dancer moons, and is also the god of unseen paths. His name is Elatha, and is a sweeheart
Reminds me that the theoretically possible but so-far unobserved “moon of a moon” is called a submoon, or moonmoon en.wikipedia.org/wiki/Subsate...
Subsatellite - Wikipedia
en.wikipedia.org
June 12, 2024 at 9:35 PM
Reminds me that the theoretically possible but so-far unobserved “moon of a moon” is called a submoon, or moonmoon en.wikipedia.org/wiki/Subsate...
SPACE FACTS: DAY 152/365🧪🛰️🔭
It is theoretically possible for a moon to have its own moon! Such an object might be called a submoon, a subsatellite, or a moonmoon (my favorite). And although we do not know of any natural moonmoons, there are several artificial moonmoons!
It is theoretically possible for a moon to have its own moon! Such an object might be called a submoon, a subsatellite, or a moonmoon (my favorite). And although we do not know of any natural moonmoons, there are several artificial moonmoons!
November 24, 2023 at 10:27 PM
SPACE FACTS: DAY 152/365🧪🛰️🔭
It is theoretically possible for a moon to have its own moon! Such an object might be called a submoon, a subsatellite, or a moonmoon (my favorite). And although we do not know of any natural moonmoons, there are several artificial moonmoons!
It is theoretically possible for a moon to have its own moon! Such an object might be called a submoon, a subsatellite, or a moonmoon (my favorite). And although we do not know of any natural moonmoons, there are several artificial moonmoons!