New data shows that the vast majority of our galaxy's mass is dark matter.

March 9, 2019

This stellar stream has been hiding in plain sight.

February 20, 2019

A new 3D map shows that our galaxy isn't nearly as tidy as we thought.

February 4, 2019

"We should not fear the supermassive black hole."

January 21, 2019

The collision "could knock us out of the Milky Way."

January 4, 2019

It's both massive and extremely diffuse.

November 29, 2018

There may be more of these lone wanderers than stars in the galaxy.

November 9, 2018

Eleven stellar streams have been identified, largely in the Milky Way's halo.

January 24, 2018

It accounts for 85 percent of all matter — yet we've never directly observed it.

November 2, 2017

This study transforms our understanding of how galaxies formed from the Big Bang.

August 5, 2017