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astrothad: M 51, before and after SN 2011 dh appeared
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astrothad: M 51 (Whirlpool Galaxy), 2011-06-07 0800 UT (reprocess)
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astrothad: M 51 (Whirlpool Galaxy), 2011-05-31 0700 UT (reprocess)
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astrothad: M 20 (Trifid Nebula), 2011-05-31 0830 UT (reprocess)
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astrothad: M 57 (Ring Nebula), 2011-05-01 0800UT (reprocess)