Every second, a star explodes somewhere in our vast universe. 🌟 We can watch a supernova in the galaxy NGC 2525 fade away in this video, featuring a time-lapse of photos taken by Hubble over the course of a year! Since supernovae of this type all peak at the same brightness, astronomers can then use that measure of brightness to figure out what the distance of their host galaxies is from Earth. This helps us learn more about the expansion rate of the universe. For more information: https://www.