For 80 years, scientists have puzzled over the way galaxies and
other cosmic structures appear to gravitate toward something they
cannot see. This hypothetical “dark matter” seems to outweigh all
visible matter by a startling ratio of five to one...
Tracy Slatyer, physicist and Member (2010-13) in the School of Natural Sciences, is searching for faint wisps of dark matter annihilating in the early universe—and perhaps in hiding places closer to home.
A recently discovered ultra-faint dwarf galaxy is sending
astronomers clues about the makeup of dark matter in the
neighborhood of the Milky Way. It is one more clue that a type of
stellar object called massive compact halo objects (MACHOs)
are...
