We often focus on space observatories that peer beyond Earth. But the vast majority of satellites stare right back at us.

Mars may look like a dry and dusty world, but just beneath its surface lies one of the most surprising discoveries in ...

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

NASA's SWOT satellite has revealed unseen ocean depths, mapping seafloor features that shape life, currents and tectonics.