Astronomers Find Primordial Stellar Stream in Milky Way’s Halo
Named C-19, the newly-discovered stellar stream is the remnant of an ancient globular cluster and contains stars with extremely low metallicity, with a heavy element content 2,500 times lower than that of the Sun. C-19 is a grouping of stars in the Milky Way halo that share a common orbital motion around the Galaxy. Image credit: Gemini Observatory / NOIRLab / NSF / AURA / J. da Silva / Spaceengine...