The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

For decades, Pluto was celebrated as the ninth planet of our solar system. However, in 2006, the International Astronomical ...

A U.S. scientist searching for a civilization across 7 Earth clones circling the red dwarf star TRAPPIST-1 says its own alien ...

In August 2006, the International Astronomical Union made the controversial, but correct, decision to demote Pluto from its ...

Gaia-4b is considered a super-Jupiter planet, a relatively cold gas giant, orbiting its star over 570 Earth-days. That star ...

The building blocks of life could have been delivered to solar system dwarf planet Ceres by one or more space rocks from the ...

Scientists studying samples that NASA collected from the asteroid Bennu found a wide assortment of organic molecules that ...