Milky Way Moves

Researchers led by Andrea Ghez, an astrophysicist at UCLA, used telescope images taken from 1995 though 2006 to create this animation showing the movement of select stars at the center of the Milky Way. The orbits of these stars, and calculations made using Keplers laws of planetary motion, provide the best evidence yet for the existence of a black hole at the center of the Milky Way. Of particular note are star S0-2, which orbits the black hole once every 15.56 years, and star S0-16, which comes within 90 astronomical units (the distance from the earth to the sun) of the black hole (0:11)

Latest Videos

Preview thumbnail for video'Lioness Uses New Tactics to Take Down a Kudu
Lioness Uses New Tactics to Take Down a Kudu (3:17)
Preview thumbnail for video'Hostile Lioness Withholds Food From Hungry Orphaned Cubs
Hostile Lioness Withholds Food From Hungry Orphaned Cubs (3:09)
Preview thumbnail for video'Why Depth Charges Don't Have to Touch a Submarine to Sink It
Why Depth Charges Don't Have to Touch a Submarine to Sink It (3:52)
Preview thumbnail for video'Five Young Lion Brothers Mate With One Lioness
Five Young Lion Brothers Mate With One Lioness (3:44)
Preview thumbnail for video'How Spawning Squid Offer a Buffet for Predators
How Spawning Squid Offer a Buffet for Predators (2:58)
Preview thumbnail for video'A Clever Cuttlefish Goes in for the Kill
A Clever Cuttlefish Goes in for the Kill (1:55)
Preview thumbnail for video'The Remarkable Way Calamari Squid Catch Their Prey
The Remarkable Way Calamari Squid Catch Their Prey (1:37)
Preview thumbnail for video'A Polar Bear Released Back Into the Wild by Helicopter
A Polar Bear Released Back Into the Wild by Helicopter (2:12)
Preview thumbnail for video'This Footage of Jaguars in Panama Could Save Their Lives
This Footage of Jaguars in Panama Could Save Their Lives (3:39)