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Enlarged photographs of the planet Mars

Enlarged photographs of the planet Mars

1909

Halley's Comet; E E Barnard

Halley's Comet; E E Barnard

1910-05-04

Portion of the Moon (rough crater region above Mare Nubium) G.W. Ritchey and by F.R. Sullivan, with 40-inch Yerkes visual refractor colour screen, and isochromatic plate, 1901, November 21, age about 10 1/2 days, term about -38[o]m., exposure, 1 sec.

Portion of the Moon; crater region above Mare Nubium

1901

Enlarged photographs of the planet Mars, E.E. Barnard, Yerkes Observatory, 1909, September 24th, 16h. 55m. G.M.T. 40-inch refractor, exposure, 4 sec, to 5 sec, Yellow colour screen

Enlarged photographs of the planet Mars

1909

Portion of the Moon (Theophilus, etc.) G.W. Richey with 40-inch Yerkes visual refractor, 1900, October 12

Portion of the Moon

1900

Portion of the Moon (Mare serenitatis and Mare tranquillitatis) G.W. Ritchey and F.R. Sullivan, with 40-inch Yerkes visual refractor, colour screen, and Isochromatic plate, 1901, August 3, age about 18 1/2 days, term, about 44[o] E., exposure, 1/2 sec.

Portion of the Moon (Mare serenitatis and Mare tranquillitatis) G.W. Ritchey and F.R. Sullivan

1901

Glass positive of:- Great Nebula in Andromeda (M.31.N.G.C.224,205,221). Ritchey and Pease, Yerkes. 24-inch Relflector 1901, September 18. 14"x17". Prepared from negative R.A.S. No.98

Glass positive of:- Great Nebula in Andromeda

1901

High level (H2) calcium vapour surrounding the Great Sun-spot of 1903, October 10, 9h. 9m. C. S.T. slit at 3968.6 Sun's diam. = .77 metre, taken with the Rumford spectroheliograph and 40-inch refractor of the Yerkes Observatory by G.E. Hale and F. Ellerman

High level (H2) calcium vapour surrounding the Great Sun-spot of 1903

1903

Glass positive 12" x 10":- globular star cluster in Pegasus. M.15.N.G.C. 7078. Enlarged from R.A.S. neg. no. 102. Ritchey and Sullivan, Yerkes Observatory, 1900, October 3

Glass positive 12" x 10":- globular star cluster in Pegasus. M.15.N.G.C. 7078.

1900

Nebula in Andromeda; N.G.C. 224, 205, 221. R.A., Oh 36m. Decl., + 40 degrees 30'. G.W. Ritchey and F.G. Pease, Yerkes Observatory; 1901, September 18; 24-inch Reflector; Focal length, 93 in. Exposure, 4 hours

Nebula in Andromeda; N.G.C. 224

1901