What's My Age? Mystery Star Cluster Has 3 Different Birthdays
Thursday, July 10, 2008 - 11:07
in Astronomy & Space
Imagine having three clocks in your house, each chiming at a different time. Astronomers have found the equivalent of three out-of-sync "clocks" in the ancient open star cluster NGC 6791. The dilemma may fundamentally challenge the way astronomers estimate cluster ages, researchers said.