The most distant stars discovered in the Milky Way might have been ripped away from a companion galaxy.
Astronomers have observed the motion of distant star clusters to measure our galaxy’s mass. The new estimate places the Milky Way in the lightweight class of galaxies.
From the discovery of gravitational waves to the building evidence that a massive planet could exist beyond Pluto, it has been a thrilling year for astronomy research. We recap.
Astronomers have mapped neutral atomic hydrogen, which profuses the space between stars, in unprecedented detail to create a beautiful radio-wavelength portrait of the Milky Way.
An intergalactic cloud has slammed into the Milky Way Galaxy and left a big hole.
Astronomers have discovered a “feeble giant”: one of the largest dwarf galaxies ever seen around the Milky Way.
It’s a bird! It’s a plane! It’s a . . . pair of hypervelocity stars? The surprising stellar duo may place constraints on the mass of our galaxy’s unseen dark matter halo.
The motions of thirteen stars in our galaxy’s halo outline a shell-like structure, perhaps the remains of an ancient galactic collision.
A stunning submillimeter mosaic of the Milky Way Galaxy captures a portrait of the cold dust and gas swirling along the galactic plane.
Ripples found in the Milky Way’s disk reveal our galaxy survived an ancient hit-and-run. Now, astronomers might have caught the culprit.
Astronomers have created an age-map of 70,000 stars spanning our galaxy, ushering in a new era of galactic archaeology.
Astronomers have detected magnetic fields writhing around the Milky Way's central black hole.
Astronomers have taken a careful census of the smallest stars in our galaxy’s center.
The presence of stars just 100 million years old in the Milky Way Galaxy’s central regions confirms our galaxy’s nonviolent past.
Soccer ball-shaped molecules lurking in the dusty corners of the Milky Way help resolve a long-standing problem.
X-ray echoes from binary star system Circinus X-1 are helping astronomers measure its distance from Earth.
Stars still embedded in their natal clouds act as signposts to map the Sagittarius-Carina, Perseus, and Outer spiral arms of the Milky Way.
NASA’s NuSTAR mission has detected an unexpected haze of high-energy X-rays in our galaxy’s center, perhaps the signal of a mass stellar graveyard.
Astronomers have detected what look like four undulations in the Milky Way Galaxy’s disk. If the structures are all part of the disk, our galaxy is more than half again as large as we thought it was.
Astronomers have found two just-born star clusters an incredible 16,000 light-years above the plane of the Milky Way galaxy.
New observations suggest that several dozen low-mass stars, and eventually perhaps even planets, are forming just 2 light-years from our galaxy’s supermassive black hole.
Cepheid variable stars are helping astronomers see what our galaxy looks like from within.
Thanks to the help of the general public, astronomers have discovered a new signature marking a hidden phase of star formation.
The gaseous object G2 has survived its swing around the Milky Way’s central supermassive black hole, but the questions of what it is and where it comes from remain unanswered.
Astronomers have mapped the cosmic watershed and discovered a massive supercluster that extends more than 500 million light-years and contains 100,000 large galaxies. The Milky Way sits on the edge of this humongous structure.