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Hamara Forums _ Education World _ Observational Evidence For Black Holes

Posted by: kallubhai4u Sep 1 2005, 11:21 AM

Attached Image Observational Evidence for Black Holes

Dust disk around a black hole

This Hubble Space Telescope image contains three main features.
The outer white area is the core or centre of the galaxy NGC4261.

Inside the core there is a brown spiral-shaped disk. It weighs on hundred thousand times as much as our sun.

Because it is rotating we can measure the radii and speed of its constituents, and hence weigh the object at its centre. This object is about as large as our solar system, but weighs 1,200,000,000 times as much as our sun.

This means that gravity is about one million times as strong as on the sun. Almost certainly this object is a black hole.

Posted by: visuja Sep 1 2005, 11:28 AM

Kallubhai-ji,
Please consider this as a humble request. Could you post all info related to black holes in a single thread ? That way everyone could participate in that thread and have a fruitful / informative discussion on black holes.

Vivek

Posted by: kallubhai4u Sep 2 2005, 09:35 AM

thanks 4 that reply. i'll try my level best. ur support will definitely boost up my knowledge/confidence or whatsoever.