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Q:If light cannot escape black holes, how can we take pictures of them?A:You are correct that light can't escape a black hole. What we can see in astronomical images is light from material that is heated up when it gets close to a black hole. This material can glow very brightly, especially in ultraviolet light and X-rays.Please see: http://chandra.harvard.edu/xray_sources/blackholes.html for more details. |
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Revised: April 27, 2006
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