Though it’s devoured and destroyed countless smaller galaxies in its nearly 14-billion-year history, the Milky Way has earned itself two halos of stars, according to astronomers. Though our galaxy is shaped like a flat disk of up to 400 billion stars rotating clockwise, it also wears two crowns of stars that make up a spherical haze and envelops the galaxy’s disk. Though others have suggested that the galaxy wears two halos of stars before, this is the first definitive proof of two different halos, he said.