Galaxies can suddenly stop forming stars when their gas supply is disrupted or exhausted. Powerful black hole eruptions, supernova winds, or collisions strip away the fuel needed for star birth. Without fresh gas, galaxies enter a “quenched” state, appearing older and redder. This cosmic mystery reveals how delicate the balance of star formation is, and why some galaxies evolve faster than others…
The newly discovered precocious young galaxy appears to have formed in record time The post Milky Way’s Twin Causes Rethink of Galactic Evolution appeared first on Nautilus .
A growing catalog of huge but dim galaxies such as Dragonfly 44 is forcing astronomers to invent new theories of galactic evolution. The post The Enduring Mystery of the Dragonfly 44 Galaxy first appeared on Quanta Magazine
