Imagine trying to label every star, galaxy, or distant quasar in the sky, millions upon millions of them. Until now, this job relied heavily on a precise but slow method called spectroscopy, which is ...

A Yale-led team of astronomers has detected an intensely brightening and dimming quasar that may help explain how some objects in the early universe grew at a highly accelerated rate. The discovery, ...

ANAHEIM, Calif. — Change is in the air. New data strengthen a hint that dark energy, long thought to be a constant force in the universe, might change over time. Dark energy explains the observation ...