Abell 644 is in the center of a galaxy cluster that lies about 920 million light years from Earth. At the center of this galaxy is a growing supermassive black hole, called an active galactic nucleus (AGN) by astronomers, which is pulling in large quantities of gas. Release date December 20, 2010.
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Creative#:
TOP22313973
Source:
達志影像
Authorization Type:
RM
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須由TPG 完整授權
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N/A
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No
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No
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