£110
Group of unusually large format antique astronomy glass projector slides, Royal Observatory Greenwich, early 20th Century. Largest 30.5 x 30.5cm. Remainder W30.5, H 25cm. Depicting the Pleides Nov 1899, solar flare, Comet d 1907, looped nebula in Cygnus, great nebula in Andromeda, Comet c1911, star trails around the north pole, franklin-adams chart star cloud in sagittarius. Possibly created for educational use. (8)
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