Astronomers may soon be able to detect volcanic eruptions on Earth-like alien planets, a new study suggests.

The pockmarked moon is seen by NASA's Cassini spacecraft as a partial globe hanging in space, as well as in close-ups that reveal its many craters.

An instrument on an upcoming mission to orbit will make daily maps of the Red Planet's atmosphere.

Two asteroids will swing close by the Earth Sept. 8, passing at a distance closer than our moon. The asteroids don�t pose a threat, but do provide a challenging skywatching opportunity.

New images capture a galactic "super-volcano" in the massive galaxy M87 is erupting and blasting gas outwards.