Andromeda Galaxy’s Massive Halo Already ‘Bumping’ into Our Milky Way Galaxy’s

Rob Garner, NASA’s Goddard Space Flight Center Phys.org This headline image illustration shows the location of the 43 quasars scientists used to probe Andromeda’s gaseous halo. These quasars–the very distant, brilliant cores of active galaxies powered by black holes–are scattered far behind the halo, allowing scientists to probe multiple regions. Looking through the immense halo at the quasars’ light, the … Continue reading →