Milky Way halo pictured as football shaped

Cosmology

Dark Halos and Warped Disks

Galaxies are embedded within halos of dark matter, and the tilt of those halos can affect the galaxy's stellar halo and stellar disk.

The Large Magellanic Cloud's

Milky Way

Dark Matter "Wake" in the Milky Way's Outer Reaches

Astronomers have discovered that a satellite of the Milky Way has left a "wake" in the dark matter halo that surrounds our galaxy.

Galaxy rotation curves

Cosmology

Less Dark Matter in Young Galaxies?

A new study of six young, star-forming galaxies suggests they have less dark matter than expected. But the results may say more about galaxy evolution than about the nature of dark matter.

Hypervelocity Binary System

Milky Way

Speedy Stars Weigh Milky Way’s Dark Matter Halo

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.