Astronomers observe mysterious winds from a T Tauri star

T Tauri stars - infant solar systems - were thought to have powerful stellar winds. Astronomers have now observed T Tauri winds and might know what's causing them.

Sneak preview: Colorful lunar eclipse on October 7-8

Before sunrise on October 8, the bright full moon over North America will turn a lovely shade of red. It's a total lunar eclipse that's visible from all parts of the U.S.

Success! MAVEN spacecraft enters Mars orbit

NASA's MAVEN spacecraft - first spacecraft dedicated to exploring Mars' upper atmosphere - successfully entered orbit on September 21, 2014 at 10:24 p.m. EDT.

Supermassive black hole in a galaxy only 300 light-years wide

It's an unlikely object in an improbable place -- a monster black hole lurking inside one of the tiniest galaxies ever known.

Space-based particle detector hints at dark matter

A new and tantalizing hint of mysterious dark matter has been found by the Alpha Magnetic Spectrometer particle detector aboard the International Space Station.

Dawn spacecraft to Ceres recovers after malfunctions

A collision with a high-energy radiation particle may have corrupted software running in Dawn's main computer, and sent the spacecraft into safe mode.

Racing toward Pluto, spacecraft spies tiny moon Hydra

The New Horizons spacecraft - due to encounter Pluto in July 2015 - has spotted Pluto's small, faint, outermost known moon, called Hydra.

Merging galaxies can produce disk galaxies

Astronomers thought mergers formed giant elliptical galaxies. Now, for at least 24 observed galaxies, mergers have formed flattened, circular disks of dust and gas.

New catalog of visible Milky Way charts 219 million stars

Astronomers spent 10 years charting stars brighter than 20th magnitude – that's about 1 million times fainter than can be seen with the human eye.

ESA announces landing site on Rosetta’s comet

Rosetta spacecraft has been moving in tandem with its comet since August. On Monday, ESA announced the site of a November landing.