Chandra: Measuring Mass in Space
Recommend
Watch this NASA video to learn more about black holes. Black holes can be described with just two numbers - the mass of the black hole and the speed of the spin. See how NASA scientists determine the... (more info)

Watch this NASA video to learn more about black holes. Black holes can be described with just two numbers - the mass of the black hole and the speed of the spin. See how NASA scientists determine the mass of black holes in our universe.

Related Article: How do astronomers detect that a star has a planet orbiting it?

most watched: astronomy videos
explore video categories: astronomy