A team of astronomers has measured the ‘heartbeats’ of stars within Messier 87, a giant elliptical galaxy located some 53 million light-years from us in the constellation Virgo, and used that data to determine the galaxy’s age. Messier 87 is the dominant galaxy at the center of the neighboring Virgo cluster of galaxies. Image credit: NASA / ESA / Hubble Heritage Team. It is the first time astronomers have measured the effect that pulsating red...
