Stellar Streams in the Milky Way Halo (A Gallery)

Streams of stars abound in the Milky Way halo, as discussed in the April 2017 issue of Sky & Telescope. They are the remains of dwarf galaxies that once orbited the Milky Way, passed by too closely, and tore apart in our galaxy's gravitational well. We showcase here additional stunning images of these galactic ghosts.
This map of the sky shows the stars that are part of the Sagittarius streams, as imaged by the SDSS, against a backdrop of the galactic plane, which the SDSS largely avoids. Th