More than a billion stars mapped in Milky Way: ESA
The Gaia space probe, launched in December 2013, has mapped more than a billion stars in the Milky Way.
Cosmic ray mystery lifted in new findings
Cosmic rays -- fast-moving particles that constantly pummel our planet -- come from the explosion of supernovae, new research confirmed Thursday, resolving an astronomical mystery.
'17 billion' Earth-sized planets in Milky Way: study
The Milky Way contains at least 17 billion planets the size of Earth, and likely many more, according to a study out Monday that raises the chances of discovering a sister planet to ours.
PHOTO: Non-professional astronomer made a unique panoramic image of the Milky Way
American photographer and non-professional astronomer Nick Risinger pictured a unique panoramic view of the Milky Way in real color.