European cosmologists and particle physicists come together to tweak an accepted model of how cold dark matter helps build galaxies in our universe.

The comet turns out to be a unique, multifaceted world. We now know comets can have cliffs, depressions, craters, boulders or even parallel grooves.

Tiny moons, no bigger than large mountains, may coalesce and collide with the densest part of the ring, creating luminous knots. But the moons don't last long.

Asteroid passes near Earth on September 7. At its closest (18:18 UTC / 2:18 p.m. EDT), it's about the same distance from Earth as weather and communications satellites.

Heads up, stamp collectors and astronomy enthusiasts! A collection of new stamps from the Isle of Man, which has 26 Dark Sky sites.

Yet more evidence that many worlds in our Milky Way galaxy have two suns.

Astronomers have learned that our Local Group of galaxies - known to be part of the Virgo Supercluster - is also part of an even-larger supercluster. The newly identified supercluster is called Laniakea, which is Hawaiian for "immense heaven."

Submit your message on the future of communications or solar system exploration. It might be chosen for a time capsule aboard an asteroid sample return mission.

National Radio Astronomy Observatory astronomers used a tried-and-true method - stellar parallax - to resolve a controversy over the Pleiades' distance.

A NASA sounding rocket has confirmed that the solar system is inside an ancient supernova remnant. Life on Earth survived despite the nearby blasts.