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'How Science Helps Preserve Longmen Grottoes
How Science Helps Preserve Longmen Grottoes (2:17)
Preview thumbnail for video'How the Common Cold Affected the Crew of Apollo 7
How the Common Cold Affected the Crew of Apollo 7 (3:32)
Preview thumbnail for video'How Fast Can Gibbons Swing Through the Forest?
How Fast Can Gibbons Swing Through the Forest? (3:04)
Preview thumbnail for video'Why Bush Dogs Are So Different From Other Dogs
Why Bush Dogs Are So Different From Other Dogs (2:43)
Preview thumbnail for video'Lava From Kilauea Reaches the Ocean
Lava From Kilauea Reaches the Ocean (2:26)
Preview thumbnail for video'The First Fissures of the 2018 Kilauea Volcanic Eruption Open
The First Fissures of the 2018 Kilauea Volcanic Eruption Open (3:36)
Preview thumbnail for video'Apollo 13's Intense Comms Blackout
Apollo 13's Intense Comms Blackout (3:47)
Preview thumbnail for video'A Moon Sample Reveals a Surprising Link to Earth
A Moon Sample Reveals a Surprising Link to Earth (2:04)
Preview thumbnail for video'These Atomic Bomb Tests Used U.S. Troops as Guinea Pigs
These Atomic Bomb Tests Used U.S. Troops as Guinea Pigs (3:29)