New theory explains seeds of life in asteroids

An alternative to a long-taught - but largely discredited - theory that seeks to explain how biomolecules were once able to form inside of asteroids.

Mars rover uncovers a surprisingly Earth-like rock

Analysis of a rock on Mars by the rover Curiosity suggests parts of the red planet may be more like our own than we ever knew.

As Comet ISON sweeps past Mars October 1, most observations will happen

NASA and ESA announced earlier they were readying a flotilla of spacecraft to record the comet's passage near Mars. How much will the U.S. government shutdown interfere? Not much, it seems.

Do black holes have hair?

Black holes may be less simple and "clean" than how the most authoritative theoretical model describes them.

Cassini spacecraft finds plastic in space

NASA's Cassini spacecraft has detected propylene, a chemical used to make food-storage containers, car bumpers and other consumer products, on Saturn's moon Titan.

Mars Curiosity rover finds water in scoop of soil sample

The first scoop of soil analyzed in the belly of the Curiosity rover on Mars reveals that fine materials on the surface of the planet contain several percent water by weight.

Over 400 reports of large fireball over U.S. Midwest on September 26

People in Ohio, Illinois, Indiana, Kentucky, Missouri and Wisconsin saw it.

Astronomers find missing link pulsar

Newly discovered pulsar switches between emitting X-rays and emitting radio waves. It's the first direct evidence of one kind of pulsar turning into another.

Amateur astronomers see Comet ISON

"Certainly we would love it to be a couple of magnitudes brighter right now, but it's doing just fine. I'd say it's still on course to become a very eye-catching object." - Karl Battams, Naval Research Lab in Washington, D.C.

Astronomers discover densest galaxy ever

Imagine the distance between the sun and nearest star system, Alpha Centauri. That’s a distance of about 4 light-years. Now, imagine as many as 10,000 of our suns crammed into that relatively small space.