How many moons does Jupiter have? Scientists have discovered dozens of them, but the answer may be more complicated than it ...

In crafting a piece for the Europa Clipper launch, the U.S. Poet Laureate focused her affections toward Earth itself.

But the sturdy plate — inscribed with far more than the poignant words of Limón — also has a twin that sits on our planet.

NASA's Europa Clipper mission has launched to study Jupiter's icy moon Europa, which may harbor a potentially habitable ocean ...