Data from the Gaia satellite reveal 20 new high-speed stars, 13 of which appear to have originated outside of the Milky Way.
The Milky Way's two largest companion galaxies may have once been a threesome — but new data from the Gaia satellite leaves the satellites' history an open question.
An unexpected pattern in the Milky Way's disk of stars points to a recent whack from another galaxy.
With its second data release, the European Space Agency's Gaia satellite has redefined the way we look at our galaxy.
This is what the largest available image of the Milky Way using only off-the-shelf photographic equipment looks like.
The discovery of a runaway star in the Small Magellanic Cloud suggests that runaway stars are a common phenomenon in the universe.
A new study has uncovered a dozen stellar-mass black holes within 3 light-years of the supermassive black hole at our galaxy’s core — and these might be just the tip of the iceberg.
A long-ago encounter between our galaxy and an orbiting dwarf might have ejected some of the Milky Way’s stars.
Citizen scientists have discovered a system of five sub-Neptune planets, NASA scientists follow the spin of Comet 41P, and speedy clouds of gas shed light on the Millky Way's history.
A hunt for merging dwarf galaxies has yielded an intriguing result: 180 million light-years away, a galaxy very similar to the Milky Way — with two dwarf-galaxy satellites just like our own Magellanic clouds
The detection of a star-forming region 66,500 light-years from Earth, on the other side of our galaxy’s center, lends weight to the existence of an extended arm of the Milky Way.
Wondering what you'll see during the total solar eclipse on August 21st? Use our all-sky maps to figure it out!
High-powered simulations suggest that half of the material in the Milky Way could come from other galaxies.
Astronomers found six runaway stars when they applied a neural network to data from the European Space Agency’s Gaia mission, which is set to map a billion stars across the Milky Way and beyond.
The region around Sgr A*, the 4-million-solar-mass black hole at the heart of our galaxy, is a complex and dynamic place. New Atacama Large Millimeter/submillimeter Array (ALMA) observations of the Milky Way’s center now reveal more about this harsh, inhospitable environment.
Astronomers have transformed star data from the Gaia and Hipparcos missions into a video that predicts stellar motions millions of years from now.
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.