Stellar archeology traces Milky Way's history
Thursday, May 31, 2012 - 16:34
in Astronomy & Space
Unfortunately, stars don't have birth certificates. So, astronomers have a tough time figuring out their ages. Knowing a star's age is critical for understanding how our Milky Way galaxy built itself up over billions of years from smaller galaxies. But an astronomer has now found the next best thing to a star's birth certificate.