That's no sunspot. It's the International Space Station (ISS) caught passing in front of the Sun.

What's that in the sky? An aurora.

Get out your red/blue glasses and check out this stereo view from lunar orbit.

Irregular galaxy NGC 55 is thought to be similar to the Large Magellanic Cloud (LMC).

Close-up images of NGC 3242 show the cast off shroud of a dying, sun-like star fancifully known as The Ghost of Jupiter nebula.

Over 4000 planets are now known to exist outside our Solar System.

What do birds do during a total solar eclipse?

What's happening at the center of our galaxy?

Saturn never shows a crescent phase from Earth.

The total phase of the July 2nd solar eclipse lasted about 4 minutes and 30 seconds at the point of maximum eclipse.