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1672 — Laurent Cassegrain, produces a design for a reflecting telescope using a paraboloid primary mirror and a hyperboloid secondary mirror. The design, named 'Cassegrain', is still used in astronomical telescopes used in observatories in 2006. 1674 — Robert Hooke produces a reflecting telescope based on the Gregorian design.
Nowadays, the word "telescope" is defined as a wide range of instruments capable of detecting different regions of the electromagnetic spectrum, and in some cases other types of detectors. The first known practical telescopes were refracting telescopes with glass lenses and were invented in the Netherlands at the
Notes on Hans Lippershey's unsuccessful telescope patent in 1608. The first record of a telescope comes from the Netherlands in 1608. It is in a patent filed by Middelburg spectacle-maker Hans Lippershey with the States General of the Netherlands on 2 October 1608 for his instrument "for seeing things far away as if they were nearby." [12] A few weeks later another Dutch instrument-maker ...
Cox built his first telescope, a 6-inch reflector, at age 16 and four years later had completed a 10-inch reflector as well. [1] With Lou Lojas, Ed Hanna and Carl Groswendt, he founded the Amateur Telescope Makers of New York which became the Optical Division of the New York Amateur Astronomers Association in 1937.
PDF Studio is a commercial desktop application from Qoppa Software to create, convert, review, annotate, and edit Portable Document Format (PDF) documents. System requirements [ edit ]
George Ellery Hale (June 29, 1868 – February 21, 1938) was an American astrophysicist, best known for his discovery of magnetic fields in sunspots, and as the leader or key figure in the planning or construction of several world-leading telescopes; namely, the 40-inch refracting telescope at Yerkes Observatory, 60-inch Hale reflecting telescope at Mount Wilson Observatory, 100-inch Hooker ...
Sarah Mather, originally from Brooklyn, New York, is most known for her invention of the underwater telescope. Born Sarah Porter Stiman in 1796, she was married to Harlow Mather at age 23, in 1819. Several years later, in 1845, April 16 she received a patent for her innovation of the “submarine telescope and lamp”.
CutePDF is a proprietary Portable Document Format converter and editor for Microsoft Windows developed by Acro Software. [1] [2] CutePDF Writer can create PDF files, [3] and CutePDF Form Filler can edit simple PDF forms so that they can be sent without using more expensive PDF authoring software. [4] CutePDF can convert documents, images, and ...