M17 (Observations)
Revision as of 14:28, 20 April 2018 by Kuehnel (talk | contribs) (Created page with "Category:Observatory {| class="wikitable" ! Image ! Comment |- | File:m17_final_small.jpg | 960sec L + 1260sec H-alpha + 660sec OIII (observation from 2011/06/2...")