How old are sun-like stars? That's a good question, and it's one that astronomers have been struggling with for quite some time. Now, scientists have a new technique for measuring the age of a star by using its spin.
The NASA Hubble Space Telescope has made an unusual discovery. It's taken a snapshot of two elliptical galaxies merging into one while a "chain" of young, stellar superclusters wind around the galaxies' nuclei.
The Arecibo telescope has detected a brief, mysterious radio pulse that seems to have come from far beyond our galaxy.
NASA's MESSENGER spacecraft and STEREO measurements have opened up a new way for scientists to understand exactly what's happening within our nearest star.
Astronomers have used new observations to create the first high-resolution 3D model of the stunning and explosive event involving the massive binary star system, Eta Carinae.
Jupiter's icy moon, Ganymede, and our own planet Earth may have more in common than you might have thought at first.
In this case, a certain galaxy is both red and dead. Astronomers have discovered the carbon monoxide in a galaxy located about 12 billion light-years from Earth and have found that it's running out of gas, slowly pushing it toward its own destruction.
Mercury, one of the closest planets to our sun, has long puzzled scientists with its unusual metal-rich composition. Now, researchers have discovered the possible origins of Mercury.
NASA scientists have found out that friction may play a larger role than expected; it could be key to survival for distant Earth-sized planets traveling in dangerous orbits.
Astronomers have discovered that the supermassive black holes at the cores of some galaxies drive massive outflows of molecular hydrogen gas, which can directly impact the galaxies' evolution.
Scientists have made a new, surprising discovery. They've found that the properties of the early universe were determined by the smallest galaxies.