It's been one Neptunian year—or about 165 Earth years—since astronomers first observed the most distant planet from the sun.

Earth might seem ancient, but compared to the age of the universe, it’s surprisingly young. Our planet formed about 4.5 […] ...

Cassini data reveal how Saturn’s moon Enceladus leaks enough heat to keep its buried ocean warm and potentially habitable ...

With news outlets covering mostly violence and crime 24/7, it’s hard not to feel secure in this world. That doesn’t mean safe ...