Re: Black-hole eclipse sizes up X-ray source

On Apr 17, 8:39 pm, Sam Wormley <sworml...@xxxxxxxxx> wrote:
Black-hole eclipse sizes up X-ray source
http://physicsweb.org/articles/news/11/4/12/1

17 April 2007

The eclipse of a supermassive black hole has allowed astronomers to
make the first direct measurement of the size of the disk-shaped
X-ray source that surrounds these celestial bodies. The event
occurred when a gas cloud moved across the supermassive black hole
that lies at the centre of NGC 1365 galaxy -- which is about 60
million light years from Earth -- temporarily obscuring X-rays
emitted by the disk. By noting the time it took for the cloud to pass
in front of the disk, astronomers using NASA's Chandra X-ray
telescope concluded that the diameter of the disk is about seven
times the distance between the Earth and Sun.

See:http://physicsweb.org/articles/news/11/4/12/1

Sam, I'll try one more time in hopes you're at least as good at
learning as you are at teaching.

Is there some reason you can't link directly to the NASA source?

Here, let me show you how:

http://science.nasa.gov/headlines/y2007/12apr_blackholeeclipse.htm

See? No sign-in, no potential compromise of privacy, no ads, just
the information.

I'm starting to think you get kickbacks from physicsweb or
something.


Mark L. Fergerson

.