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'This Molecule Could Explain the Origin of Life
This Molecule Could Explain the Origin of Life (3:28)
Preview thumbnail for video'We're All Made of Stardust. Here's How.
We're All Made of Stardust. Here's How. (3:29)
Preview thumbnail for video'Why Deception Valley's Deadly Heat is Good for Wildlife
Why Deception Valley's Deadly Heat is Good for Wildlife (1:39)
Preview thumbnail for video'You Won't Believe the Size of Botswana's Salt Flats
You Won't Believe the Size of Botswana's Salt Flats (2:43)
Preview thumbnail for video'This Science Experiment Could Help Us Live on Another Planet
This Science Experiment Could Help Us Live on Another Planet (2:57)
Preview thumbnail for video'One of the Most Dangerous Mountain Passes in the World
One of the Most Dangerous Mountain Passes in the World (1:43)
Preview thumbnail for video'The Most Beautiful View of South Africa's Tswaing Crater
The Most Beautiful View of South Africa's Tswaing Crater (2:25)
Preview thumbnail for video'Stephen Hawking's Stark Warning for Humans to Leave Earth
Stephen Hawking's Stark Warning for Humans to Leave Earth (3:05)
Preview thumbnail for video'What Created These Strange Geoglyphs in South Africa?
What Created These Strange Geoglyphs in South Africa? (1:55)