A ripple in the outskirts of the Milky Way—and a hunch—led Rochester Institute of Technology astrophysicist Sukanya Chakrabarti to a previously undetected dwarf galaxy hidden under a veil of dark ...

The motions of stars in the Milky Way have revealed a giant outward ripple, set off by a massive event sometime in our galaxy's wild past. In a new analysis of data collected by the Gaia space-mapping ...

(Nanowerk News) A new snapshot of an ancient, far-off galaxy could help scientists understand how it formed and the origins of our own Milky Way. The study has been published in Monthly Notices of the ...

As scientists attempt to learn more about how galaxies evolve, an open question has been whether collisions with our dwarf galactic neighbors will one day tear apart the disk of the Milky Way. Stelios ...

Astronomers used RR Lyrae stars to trace the early Milky Way, revealing a rapid formation of its halo and disk, with chemical patterns similar to Andromeda.

The Milky Way is not the neat, flat pinwheel many of us learned about in school. Fresh data from precision star maps now show our home galaxy as a warped, rippling disc that appears to twist and ...

The standard cosmology can answer almost nothing about how the structure of a galaxy is formed. It expects a supermassive black hole at the center and dark matter in the halo to explain the ...

A new snapshot of an ancient, far-off galaxy could help scientists understand how it formed and the origins of our own Milky Way. At more than 12 billion years old, BRI 1335-0417 is the oldest and ...