The High Energy Universe

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View the sky through an x-ray telescope and the conception of the universe changes dramatically. Black holes are best seen in x-rays, because impinging gas collides with the black hole at near light speed, resulting in intense x-ray and gamma ray emission. 

Optical light also plays a role in discovering black holes since the most luminous objects in the universe emit bursts of gamma radiation which only lasts minutes, but leaves an optical afterglow.

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This event was on Wed, 31 Jan 2018


Professor Joseph Silk

Professor of Astronomy

Joseph Silk FRS, is a research scientist at the Service d’Astrophysique, CEA, Saclay and the Institut d’Astrophysique, Université Pierre et Marie Curie, Paris.

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