A 20-Year Cosmic Quest Ends, but the Universe Just Got More Mysterious

WOH G64, one of the biggest stars in the universe, has transitioned from a red supergiant to a yellow hypergiant, in what may be evidence of impending supernova

An exceptionally rare supernova that could open a new way to determine the expansion rate of the universe - finding a supernova located directly behind a gravitational lens is less than one in a million

Measuring the expansion of the universe with cosmic fireworks - EurekAlert!