Stoyan R. et al. Atlas of the Messier Objects: Highlights of the Deep Sky. — Cambridge: Cambridge Univercity Press, 2008. — P. 33.
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Charles Messier
दूसरे संस्करण
An addition to the 1st version of the Messier Catalog in the Mémoires de l'Académie Royale for 1771, between pages 460 & 461: [1]
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{{Information |Description=Orion Nebula (M42) - graphic by Charles Messier |Source=http://www.seds.org/MESSIER/xtra/history/m-m31_42.html |Date= |Author=Charles Messier |Permission= |other_versions= }} Category:Messier CatalogCategory:Nebula