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Description: | An elliptical plane mirror made as a secondary mirror for a Newtonian reflector telescope. The diameter of the minor axis of this mirror is 29.21mm.
William Herschel, with help from his brother Alexander and his sister Caroline made a number of these mirrors to go in the telescopes they made to use and to sell.
caption: Newtonian secondary mirror | Publisher: | "http://collections.rmg.co.uk/" | Rights holder: | "Royal Museums Greenwich" | Subjects: | A Catalogue of Instruments made and (or) used by Sir William Herschel as Preserved at Slough & examined ther in 1924 May & June A Peep into Herschel's Workshop elliptical plane mirrors Newtonian | Source: | Royal Museums Greenwich | Identifier: | http://collections.rmg.co.uk/collections... | Go to resource |
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