Before local midnight on August 12, this brilliant Perseid meteor flashed above the Poloniny Dark Sky Park, Slovakia, planet Earth. Streaking beside the summer Milky Way, its initial color is likely due to the shower meteor's characteristically high

The brief flash of a bright Perseid meteor streaks across the upper right in this composited series of exposures made early Sunday morning near the peak of the annual Perseid meteor shower.

When is the best time to launch a probe to the Sun?

Is there a bridge of gas connecting these two great galaxies? Quite possibly, but it is hard to be sure.

This shock wave plows through interstellar space at over 500,000 kilometers per hour.

What's that green streak in front of the Andromeda galaxy? A meteor.

Just two weeks ago, dark skies over the desert in northern Iran held this alluring celestial vista.

Beautiful spiral galaxy NGC 6744 is nearly 175,000 light-years across, larger than our own Milky Way.

Mars is also known as The Red Planet, often seen with a reddish tinge in dark night skies.

What's that spot next to the Moon? Venus.