Scientists found that one of the Milky Way’s galactic neighbors is much more massive than previously believed, implying the existence of an extended halo of dark matter that could be the result of one ancient galaxy swallowing up another.
Four antennas used in a star-gazing project point up at the night sky in Chile’s Atacama Desert. (ESO Photo Ambassador José Francisco Salgado)
(CN) Astrophysicists say that an extended halo of dark matter may surround Tucana II, one of the many dwarf galaxies neighboring the Milky Way. The ancient galaxy may also have been the site of one of the universe’s earliest galactic collisions.