Moons may seem like quiet companions to the planets, but many of them are worlds every bit as fascinating as the planets themselves. Some are covered in oceans, some erupt with lava, and others hide ...

Editor's note: This article was updated March 25 at 11:40 a.m. ET to account for the recent discovery of new moons around Saturn and Jupiter. The total number of planetary moons and small-body ...

Far from the Sun’s heat, orbiting the outer planets of the solar system, are moons with oceans of liquid water beneath their frozen surfaces. Keith Cooper finds out how planetary scientists are ...

New research suggests the moons of Jupiter and Uranus may hint that our planetary neighborhood once had a third ice giant.

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In 2025, astronomers uncovered more than 100 new moons orbiting planets in our solar system, an exciting discovery that could help unlock the mysteries of planetary formation. As reported by New ...

A dispute over the names of two new moons of Pluto is highlighting a broader battle over who names what in our solar system and beyond. On one side is the International Astronomical Union (IAU), a ...

Our solar system has two ice giants, Uranus and Neptune, but there may have been a third. According to a new study published ...