What is the difference between a moon and a planet? Trick question! According to scientific definitions, there often isn’t much of a difference at all. That might seem counterintuitive, but it’s true.

The discovery brings the total number of known Uranian moons to 29. Astronomers using NASA's James Webb Space Telescope have discovered a newfound moon orbiting icy Uranus, the seventh planet from the ...

The team of astronomers behind the find suggested it could help us better understand planet and moon formation in our solar system and beyond the Milky Way. The team was able to make the first-ever ...

The Moon Holds Way More Water Than Previously Imagined Space experts have discovered something incredible about lunar water distribution that challenges everything we thought we knew. According to a ...

The outer planets of the solar system are swarmed by ice-wrapped moons. Some of these, such as Saturn's moon Enceladus, are known to have oceans of liquid water between the ice shell and the rocky ...

Planetary size was determined pre-spacecraft by measuring the planet's angular diameter and its distance from Earth (in AU, later converted to terrestrial units after the AU was accurately measured ...

The recent discovery of a potential gas giant circling the nearby star Alpha Centauri A has led to speculation that it may be orbited in turn by a habitable moon that could support life, just like in ...

No joke: Science has found a new teeny, tiny moon orbiting Uranus. NASA announced on Tuesday that the James Webb Space Telescope found yet another moon floating around Uranus, an ice giant that ...