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#Mon Aug 09 11:54:12 CEST 2010
Text__D7AdcKOcEd-WfYQ0GneCwQ_text=<p>Black holes are not invisible\: The matter that collapses into them emits high-energy radiation such as X-rays. Such radiation can be measured with X-ray satellites like Chandra. The wall diagram shows a region of the sky in which such measurements are performed, Chandra Deep Field South \u2013 but photographed here in visible light at the European Southern Observatory in La Silla in Chile.</p>
Text__D7AdcKOcEd-WfYQ0GneCwQ_title=Photographing Black Holes