Dual Interpretations: Milky Way's Outer Fringe of Stars Sparks Disagreement
Wednesday, February 22, 2012 - 08:02
in Astronomy & Space
It's well known that the Milky Way is a spiral galaxy, a swirl of stars in an extended, many-armed disk . But the structure of the galaxy is far from two-dimensional. Above and below those familiar spiral arms is a lesser-known feature, a spherical swarm of stars that makes up a halo around the disk. [More]