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1970 – Cerro Tololo 158-inch (4.0 m) optical reflecting telescope begins operation, located in Cerro Tololo, Chile; 1970 – Kitt Peak National Observatory 158-inch (4.0 m) optical reflecting telescope begins operation, located near Tucson, Arizona; 1970 – Uhuru x-ray telescope satellite
1900 — The largest refractor ever, Great Paris Exhibition Telescope of 1900 with an objective of 49.2 inch (1.25 m) diameter is temporarily exhibited at the Paris 1900 Exposition. 1910s — George Willis Ritchey and Henri Chrétien co-invent the Ritchey-Chrétien telescope used in many, if not most of the largest astronomical telescopes.
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 ...
Hebrew astronomy refers to any astronomy written in Hebrew or by Hebrew speakers, or translated into Hebrew, or written by Jews in Judeo-Arabic.It includes a range of genres from the earliest astronomy and cosmology contained in the Bible, mainly the Tanakh (Hebrew Bible or "Old Testament"), to Jewish religious works like the Talmud and very technical works.
The Hi-Z telescope concept was developed between 1989 and 1994: [77] a fully baffled [b] 4 m (13 ft) aperture infrared telescope that would recede to an orbit at 3 Astronomical unit (AU). [78] This distant orbit would have benefited from reduced light noise from zodiacal dust. [78] Other early plans called for a NEXUS precursor telescope ...
5.9.1.4.3 South Asia. ... Invention of the telescope. History of visible-light astronomy; ... History of supernova observation; Timeline of white dwarfs, neutron ...
In 1964, three years after the Perkins Telescope arrived at Lowell Observatory, the 69-inch (1.8 m) mirror was replaced. A new 72-inch (1.8 m) mirror made of a more modern material was installed in the old mount. The old 69-inch (1.8 m) mirror was loaned to COSI in Columbus as an exhibit. (Eventually the 69 inch was returned to Perkins by the ...
They produced dozens of telescopes, including some of the largest of the 19th century, such as the 48-inch (1.2 m) Great Melbourne Telescope (a reflecting telescope) in 1868, a 27-inch (0.69 m) refractor for the Vienna Observatory in 1878, and the Greenwich 28 inch refractor in 1893.