How LIGO Works

To explore the universe humans have made any manner of telescopes. These telescopes can observe visible light, infrared light, radio waves, and even x-rays. One of the most important forces in shaping the universe is gravity. How can astronomers observe gravity? In 2002, the National Science Foundation, Caltech, and MIT managed to build a gravitational observatory. Learn more about your ad choices. Visit megaphone.fm/adchoices