thed
10-05-02, 02:58 AM
<a href="http://oposite.stsci.edu/pubinfo/pr/2002/18/pr-photos.html"><img src="http://oposite.stsci.edu/pubinfo/pr/2002/18/prc/0218w.jpg" border="0" alt="click for more info"></a>
" These two globular star clusters, M15 and G1, harbor hundreds of thousands of stars. But deep within their dense cores is an unexpected guest: a class of intermediate-sized black holes. Black holes are invisible, but the probing eye of NASA's Hubble Space Telescope found them by measuring the velocities of stars whirling around the crowded cores. "
" These two globular star clusters, M15 and G1, harbor hundreds of thousands of stars. But deep within their dense cores is an unexpected guest: a class of intermediate-sized black holes. Black holes are invisible, but the probing eye of NASA's Hubble Space Telescope found them by measuring the velocities of stars whirling around the crowded cores. "