Supernovae like this one help scientists determine how fast the universe is expanding.
Astronomers agree that the universe is growing larger, and that the rate of expansion—called the Hubble constant—is accelerating. What they don’t agree on is the best way to measure that expansion rate. Current methods have produced numbers that don’t align. But scientists are now pursuing fascinating new approaches to assess the rate, hoping to shed light on one of astronomy’s greatest mysteries.
