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 ...

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

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

Combining with one other previously confirmed planet, one of our closest stellar neighbors now has a family of four.

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

Astronomers have spotted two hefty white dwarf stars - highly compact stellar embers - orbiting close together that appear ...