Discovered by WATCH in 1992 the behaviour of GRS 1915105
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Discovered by WATCH in 1992, the behaviour of GRS 1915+105 continues to surprise

January 5, 2013
Seen here at radio wavelengths, the four images, taken a day apart, show the micro-quasar puffing clouds of hot gas at practically the speed of light. Image courtesy of R. Spencer, University of Manchester.

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