The Milky Way looks serene from our vantage point, a hazy river of light arcing across the night sky. Yet the stars that make up that glow are quietly telling a more dramatic story, one in which our ...

Astronomers have chased hypervelocity stars for more than a century. These rare objects move so fast that the Milky Way ...

Observations from the European Space Agency’s Gaia mission have revealed a giant wave rippling through the disk of the Milky Way. This image derived from Gaia data shows an edge-on view of our galaxy; ...

The Milky Way is not the calm, flat starry disk many of us learned about in school. Astronomers are now tracking a colossal, curling disturbance that ripples through our Galaxy’s disk, lifting and ...

All of the people and mountains and planets and stars that you see around you only make up 15% of the universe's mass. The rest of it is dark matter.