The planets offer exciting views in April. Jupiter is a brilliant object in the evening sky, although the observing window ...

A 2014 satellite image captured a rare glimpse of a massive, eerily circular ring of clouds that formed slap-bang in the ...

One of the first verified predictions of general relativity is the gravitational deflection of starlight. The effect was ...

Space is big and the vast majority of it is empty. Even the area immediately around the Earth where humans place satellites ...