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The Cassini spacecraft, which began its tour of the Saturn system just over a month ago, has detected lightning and a new radiation belt at Saturn, and a glow around the planet's largest moon, Titan.

PASADENA, Calif.--Astronomers have identified a new class of cosmic explosions that are more powerful than supernovae but considerably weaker than most gamma-ray bursts. The discovery strongly suggests a continuum between the two previously-known classes of explosions...

Our Sun and solar system are embedded in a broad pancake of stars deep within the disk of the Milky Way galaxy. Even from a distance, it is impossible to see our galaxy's large-scale features other than the disk...

Astronomers studying data from the National Science Foundation's Very Long Baseline Array (VLBA) and other telescopes have concluded that a binary pair of stars forming an energetic microquasar was blasted out of the cluster in which it was born by a supernova explosion some 1.7 million years ago. This is the first time that a fast-moving stellar pair has been tracked back to a specific star cluster.

This small nebula was discovered with a 3-inch telescope by amateur astronomer Jay McNeil in January 2004.

In taking this picture, Hubble's Advanced Camera for Surveys was not looking at any particular target...

Here's a great astronomy education project to work on with your kids or grandkids...

Scientists have been able to use the data they received through lunar laser ranging to study the Earth, the Moon and the character of gravity...

Listed among the program speakers is Stephen Hawking who, after nearly 30 years of arguing that a black hole destroys everything that falls into it, will be coming to announce that he was wrong. It seems that black holes may after all allow information within them to escape. Hawking will speak on this at the GR17 conference in Ireland this week.

Using an infrared video camera developed by researchers at NASA's Jet Propulsion Laboratory in Pasadena, Calif., surgeons are testing thermal imaging and image processing to see if they can create useful maps of brain tumors.

Astronomers have directly measured the mass of a single star — the first time such a feat has been accomplished for any solitary star other than our own Sun.

The Orange County Astronomers will host AstroImage 2004 on August 27 and 28 at the Curtis Theater in Brea, California.

DIY astronomical images with the expert touch using a software tool created by developed by imaging scientists at the European Space Agency, the European Southern Observatory and NASA...

The National Radio Astronomy Observatory pulls back the curtain on the very center of our galaxy and helps put the right spin on just how fast we're spinning...

NASA’s Chandra X-ray Observatory has uncovered evidence that a single star in a foreground galaxy may have magnified X-rays coming from a rare quadruple quasar. About 11 billion light years from Earth, the Cloverleaf quasar is a single object that appears as four images. The Marshall Center manages the Chandra program.