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.
The Kepler mission has discovered an exoplanet smaller than Mercury orbiting a Sun-like star.
Astronomers have confirmed that the star HD 140283 is nearly as old as the universe.
White dwarfs can have stable habitable zones for a few billion years, and planets with Earth-like atmospheres might be much easier to detect around these stellar remnants than normal, hydrogen-fusing stars.
Astronomers searching for forming planets have a new place to look. Even the thin disks around brown dwarfs are capable of forming grains large enough that, one day, they could potentially coalesce into a rocky planet.
A new set of simulations shows that systems with so-called "hot Jupiters" might also have mini-Oort clouds detectable by today's space telescopes, giving astronomers a new potential tool for finding exotic extrasolar systems.
Astronomers have found a system of six super-Earths, one of which is at the "Goldilocks" distance for sustaining liquid water. The Sun-like host of the system lies only 40 light-years away.
New analysis suggests that Fomalhaut b — an exoplanet discovered in 2008 and disputed ever since — really does exist.
Stunning auroras play in Earth's upper atmosphere, and similar cascading curtains grace the skies of giant planets, brown dwarfs — and even small stars.