The moon jelly is named for their translucent, moon-like bell.

Earth is the third planet from the Sun, and the fifth largest planet. It's the only place we know of inhabited by living things.

This Hubble image features the face-on spiral galaxy NGC 1309. Numerous background galaxies are visible through or are alongside the spiral.

Hubble captured in exquisite detail a face-on view of a remarkable-looking galaxy, the barred spiral NGC 5335.

Black holes are among the most mysterious cosmic objects, much studied but not fully understood. These objects aren’t really holes. They’re huge

This Hubble image features Messier 51 (M51) also known as the Whirlpool Galaxy. Messier 51's spiral arms are star-forming factories.

Hubble was recently retrained on NGC 6302, known as the "Butterfly Nebula," to observe it across a more complete spectrum of light, from near-ultraviolet to near-infrared, helping researchers better u...