Almost 10 years ago, a NASA spacecraft was able to take several photos of Pluto, known for decades as a planet before it was ...

Pluto is back! His adventures searching for the mysterious dwarf planets continue! Welcome to SolarBalls! Space animation ...

A powerful new observatory is the best hope yet for finding the elusive Planet 9, a large planet that some scientists say is ...

Pluto isn’t the only dwarf planet in our solar system's outer reaches. Now is an ideal time to look for the egg-shaped Haumea, says Abigail Beall ...

Astronomers have discovered four planets that are just a fraction of the mass of Earth orbiting Barnard’s Star, which is 6 ...

The relative quantities of volatile gases like methane and ethane can reveal key details about distant Kuiper Belt objects.

Planets' temperatures are largely influenced by their structural characteristics and proximity to the Sun, however, Venus ...

Pluto was once called the ninth planet, but in 2006, scientists changed its status to a dwarf planet. A planet must clear its orbit of other objects, but Pluto shares its space with many small icy ...

Barnard’s Star, discovered by American astronomer E.E. Barnard in 1916, is a low-mass red dwarf ... planets form — and which ones could be habitable for life. “When compared to our solar ...