Skygazers, mark your calendars because one of the coolest celestial events is coming around again toward the end of February.

Astronomers just measured the mass of a free-floating planet without a star for the first time ...

A decade of observations of four planets around the young planetary system V1298 Tau revealed a rare, long-sought missing ...

Discover the only planet in our solar system that rotates clockwise. Learn why this 'rebel' planet spins backwards, how a ...

From a distance, it looks like a serene blue twin of our own world, a dot that could almost pass for Earth in a telescope ...

Spectacular clouds swirl across the surface of Jupiter. These clouds contain water, just like Earth's, but are much denser on ...

In theory, a planet may be able to orbit a binary star system in a figure of eight, but it may not be particularly stable, ...