Historical record13 October 1999
NASA's Chandra X-ray Observatory obtains a deep view of the M31 nucleus and surrounding X-ray sources, including emission near the central black hole position.
United States · Science / Astronomy. Chronological records rendered directly from the World History Database.
NASA's Chandra X-ray Observatory obtains a deep view of the M31 nucleus and surrounding X-ray sources, including emission near the central black hole position.
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