NASA Turns Off Galaxy Evolution Explorer --"Discovered Giant Rings of New Stars Around Ancient, Dead Galaxies"
NASA has turned off its Galaxy Evolution Explorer (GALEX) after a decaden of operations in which the venerable space telescope used its ultraviolet vision to study hundreds of millions of galaxies across 10 billion years of cosmic time. In the space telescope's last year, it scanned across large patches of sky, including the bustling, bright center of our Milky Way. The telescope spent time staring at certain areas of the sky, findingexploded stars, called supernovae, and monitoring how objects, such as the centers of active galaxies,change over time. GALEX also scanned the sky for massive, feeding black holes and shock waves from early supernova explosions.