An artist’s rendition shows the dark matter halo (blue) that astronomers believe surrounds the Milky Way. (Credit: ESO/L. Calçada)
A massive clump of dark matter may have plowed through a conga line of stars streaming around the Milky Way, according to new research presented Tuesday at the 234th Meeting of the American Astronomical Society.
The research, led by Ana Bonaca of the Harvard-Smithsonian Center for Astrophysics, reveals a curious abnormality in an otherwise uniform stream of s