Long before humans walked the Earth, your solar system had a brush with two blazing blue stars that passed surprisingly close ...

Discover why the solar system's planets are arranged as they are, shaped by formation conditions and planetary migration.

This Saturday, Jupiter will shine at its biggest and brightest of the year as Earth passes between the largest planet in our ...

So far, humanity has yet to find its first "exomoon"—a moon orbiting a planet outside of the solar system. But that hasn't ...

Around the bright star Fomalhaut, astronomers spotted glowing clouds of debris left behind by colossal collisions between ...

Our Solar System has eight planets, a few dwarf planets and more than 200 moons. But wait. Are you seeing double? Or did ...

Mercury has long baffled astronomers because it defies much of what we know about planet formation. A new space mission ...

A solar conjunction occurs as Venus' orbit carries it into alignment with the sun and Earth. Venus will align with the sun ...

The star system V1298 Tau reveals that many planets begin as large, low-density worlds that slowly shrink and shed their ...

If humanity ever leaves the solar system, it will not be for curiosity alone. It will be because survival demands it. Proxima ...

One of the biggest recent surprises in astronomy is the discovery that most stars like the Sun harbor a planet between the ...

Most planetary systems contain worlds larger than Earth but smaller than Neptune, and the low-density planets around one ...