Collections
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Know Quasar / AGN (SIMBAD) by Shigeru (10 subjects)
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SIMBAD by friedestar (10 subjects)
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other objects by friedestar (10 subjects)
Disk Detective Talk
Know Quasar / AGN (SIMBAD) by Shigeru (10 subjects)
SIMBAD by friedestar (10 subjects)
other objects by friedestar (10 subjects)