Image of the day

From the
ATWB Customer Gallery

NGC 2170

My Account

New to Astromart?

Register an account...

Need Help?

Black Hole Found to be Spinning at 50% the Speed of Light

02/09/2007 08:27PM

Black Hole Found to be Spinning at 50% the Speed of Light

The existence of black holes is perhaps the most fascinating prediction of Einstein's General Theory of Relativity. The immense gravity well that is formed by a black hole is a place where strange things happen. Now, a team at the Harvard-Smithsonian Center for Astrophysics (CfA) has measured a stellar-mass black hole spinning so rapidly - turning more than 950 times per second, or two to three times as fast as the average kitchen blender. For comparison, the fastest speeds of common kitchen blenders are 250 to 500 Hz.


Comments:

Forgive me O Einstein- but if light cannot exit a black hole from inside the event horizon, why wouldn't it be able to spin FASTER than C? I understand that such an effect would create a causality nightmare for translational motion, but isn't a black hole in effect cut off from all this (except for maybe Hawking radiation)?<br><br>Now just suppose I'm right, then if 1C cuts the radius of the effect in the article in half, would 2C spin allow orbiting gas to get right up to the singularity?<br><br>OK, now I'll go take my meds..... <img class='' src='http://new.astromart.com/astromart/javascripts/sceditor/emoticons/grin.png' alt='grin' title='grin'/> <br><br>Jess Tauber