a  dwarf galaxy  is merging with the Milky Way. This galaxy is tentatively named the  Virgo Stellar Stream  and is found in the direction of  Virgo  about 30,000 light-years (9 kpc) away. Gamma-ray bubbles On November 9, 2010,  Doug Finkbeiner  of the  Harvard–Smithsonian Center for Astrophysics  announced that he had detected two