Life outside the Earth is one of the biggest "what if" in history, but NASA is trying to put a end to the discussion - or add more to it - with this new world.

The planet Jupiter has no solid ground – no surface, like the grass or dirt you tread here on Earth. There’s nothing to walk on, and no place to land a spaceship. But how can that be? If Jupiter doesn ...

One summer night in 1877, American astronomer Asaph Hall was looking through his telescope in Washington, D.C. Mars was at ...

A map centered at the estimated source region for potential plumes from Europa. NASA/JPL-Caltech/SETI Institute Downloads ...