Re: How to take photos of a black hole ? ? ?

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From: Chris L Peterson
Date: Wed, 17 Nov 2004 14:36

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On 16 Nov 2004 22:58:58 -0800, mallet_riveter@yahoo.co.in (Hans-Marc Olsen)
wrote:

>It will eat all the light, so how can I take a photo of it?

When you image a black hole, you are really imaging its effect on material
around it. So you see radiation that is emitted when matter falls down into it,
or the secondary effects of that radiation on surrounding gases.

In principle, you could also see a black hole as an area of darkness against its
background, but all known black holes are too small and too far away for this
approach to have worked in practice. They are below the resolution threshold of
any telescope.

_________________________________________________

Chris L Peterson
Cloudbait Observatory
http://www.cloudbait.com

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From: Chris L Peterson <clp@alumni.caltech.edu>
Newsgroups: sci.astro.ccd-imaging,can.sun-stroke
Subject: Re: How to take photos of a black hole ? ? ?
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