New data on Boyajian's Star show that dust — not an alien megastructure — is probably the cause of this star's mysterious behavior.
Astronomers have discovered a potentially rocky planet around a red dwarf star just 11 light-years away.
Tantalizing new observations hint that there's a lot more going on in the Proxima Centauri system — the one that hosts the exoplanet nearest Earth — than meets the eye.
Astronomers have found one of the best exomoon candidates in data collected by the Kepler spacecraft.
A new study of a nearby cluster of newly formed stars reveals that brown dwarfs may rival stars in the Milky Way in number, with one brown dwarf for every two bona fide stars.
The possible discovery of a massive ringed planet in Orion needs confirmation — and amateur astronomers can help.
Two recent studies suggest that brown dwarfs, or so-called “failed stars,” are nevertheless more like stars than planets.
The most distant stars discovered in the Milky Way might have been ripped away from a companion galaxy.
Astronomers have discovered a “feeble giant”: one of the largest dwarf galaxies ever seen around the Milky Way.
Astronomers have taken a careful census of the smallest stars in our galaxy’s center.
Astronomers have gathered enough observations to produce an exquisite image of another star’s surface.
Recent radio observations support the idea that brown dwarfs form like full-fledged stars do.
Astronomers have confirmed that the planet Gliese 436b seems to be trailing a gigantic, comet-like cloud of hydrogen.
Astronomers have confirmed that the star J1407 seems to have a companion with a gigantic, gap-ridden ring, inside which an “exomoon” might be forming.
Astronomers have expanded their ability to date stars using the stars’ own spins.
The Subaru Telescope has donned a new pair of glasses called Raven, a multi-object adaptive optics system that enables astronomers to correct for atmospheric turbulence over an unprecedented field of view.
Astronomers have discovered two stars that lie more than 700,000 light-years from Earth, making them the most distant stellar members of our galaxy ever detected. Blogger John Bochanski tells the story of how his team found these faraway stars.
Astronomers have confirmed that a star in the constellation Hercules is a dead ringer for one of the Sun’s long-lost brothers.
Infrared observations have uncovered a cool brown dwarf that’s only about 7 light-years away. The object is one of the closest stellar systems to the Sun and the coolest brown dwarf yet discovered.
Astronomers have found a size gap between stars that fuse hydrogen in their cores and so-called failed stars, which never muster the ability to sustain fusion. This boundary could help observers precisely identify the smallest stellar citizens.
Astronomers confirm that debris from Comet 209P/LINEAR should create a sky show on May 24, 2014 — but it looks less likely that a “storm” is in the works.
New studies of the coolest brown dwarfs are helping astronomers explore the mysterious objects that bridge the gap between stars and planets.
How old are the Sun's stellar neighbors? An inventive approach suggests that the birth rate for the nearest stars has had two peaks instead of one — meaning two distinct generations are mixing in the neighborhood.
New observations with the powerful ALMA observatory reveal a huge pile-up of dust around a young star. The result could help astronomers solve a long-standing mystery in planet formation.
There's a big gap in the dusty disk around the young star V1247 Orionis. Such a gap should be carved out by one or more planets, but astronomers can't find any.