Infrared observations of Nereid hint that it might have formed in orbit around Neptune, unlike most of the planet’s other satellites.
moons
Posted inNews
Uranus’s Small Moons Are Dark, Red, and Water-Poor
…Except for Mab, which is even weirder than expected.
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Sediments Hint at Large Ancient Martian Moon
Regular, alternating layers in Gale Crater may have been deposited as the result of tides raised by a moon at least 18 times the mass of Phobos, a study says.
Posted inResearch Spotlights
Webb Telescope Spies Io’s Volcanic Activity and Sulfurous Atmosphere
New James Webb Space Telescope images reveal cooling lava, volcanic sulfur monoxide gas, and sulfur gas emissions created by interactions between plasma and the moon’s atmosphere.
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Tiny Uranian Moon Likely Had a Massive Subsurface Ocean
Ariel’s tempestuous subsurface ocean may have once composed more than half its total volume.
Posted inResearch Spotlights
Jupiter’s Moon Callisto Is Very Likely an Ocean World
A closer look at previously disregarded observations reveals stronger evidence that a deep ocean lies beneath Callisto’s icy surface.
Posted inFeatures
A Dragonfly for Titan
A new eight-rotor robotic probe will head to the solar system’s most Earth-like moon. Here’s what its team is doing to prepare.
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Pluto Captured Charon with a Kiss
A newly understood collision mechanism could explain some peculiarities of Pluto and its moons.
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Io Probably Doesn’t Have a Global Magma Ocean After All
Data from the Juno spacecraft may have answered a decades-old question about Jupiter’s moon.
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Pluto’s Small Moons Are Unlike Any Other
The strange blend of surface chemistry on Nix and Hydra raises big question about the evolution of the Pluto system.