Radiation emitted in the vicinity of black holes could be used to measure distances of billions of light years, says researcher.

Landsat satellites have provided a near-continuous record of Earth's surface seen from space for over 40 years. Newest Landsat launched February 11.

For the past few days, our friends around the world have been out at night looking for meteors. Here are some of the great pics they've shared them with us!

Can't wait for tonight's Lyrid meteor shower, or can't watch due to clouds? Check out this beautiful video of the 2010 Geminid shower.

In January, 2014, Earth will pass through a stream of fine-grained debris from Comet ISON. Scientists say the resulting shower could have some interesting properties.

Scientists probe the source of a pulsing signal in the sleeping brain

Astronomers have used NASA's Hubble Space Telescope to photograph the iconic Horsehead Nebula in a new, infrared light to mark the 23rd anniversary of the famous observatory's launch aboard the space shuttle Discovery on April 24, 1990.

NASA's Kepler mission has discovered two new planetary systems that include three super-Earth-size planets in the "habitable zone," the range of distance from a star where the surface temperature of an orbiting planet might be suitable for liquid water.

The researchers say this research bolsters our understanding of the evolutionary link between birds and dinosaurs.

The International Space Station cuts a trail of light across the night sky.