A Great Reflecting Telescope

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“These telescopes were all reflectors; that is, instead of looking up at a star through a tube with a glass in the upper end [Herschel] would look down into the tube away from the star and see its reflecting in a concave mirror at the lower end of the tube."—The Foundation Library, 1911


Library, The Foundation The Wonderful Universe, Volume IV (Chicago, IL: The Educational Society, 1911)


TIFF (full resolution)

2400×1570, 2.7 MiB

Large GIF

1024×669, 388.0 KiB

Medium GIF

640×418, 178.0 KiB

Small GIF

320×209, 47.8 KiB