Glass positive:- Trifid Nebula in Sagittarius
- Made:
- 1921 in Mount Wilson
- maker:
- Science Museum
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LicenseGlass positive:- Trifid Nebula in Sagittarius, M.20 N.G.C
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Glass positive:- Trifid Nebula in Sagittarius, M.20 N.G.C.6514, R.A., 17h 54m, decl, - 23[ o] 2', Mount Wilson Observatory, 1921 June 30, 100-inch Reflector, focal length, 42 ft, exposure, 2 1/2 hours, 8" x 10"
