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Primary lens: The objective of a refracting telescope. Primary mirror: The objective of a reflecting telescope. Corrector plate: A full aperture negative lens placed before a primary mirror designed to correct the optical aberrations of the mirror. Schmidt corrector plate: An aspheric-shaped corrector plate used in the Schmidt telescope.
CEERS-2112 is a barred spiral galaxy, resembling the structure of the Milky Way. It presents a concentration of stars moving on very elliptical orbits in its central region, which appears as an elongated structure (stellar bar), from which two faint spiral arms develop.
A Serrurier truss tube assembly on the Carl Zeiss Cassegrain telescope in Ostrowik near Warsaw.. A Serrurier truss is used in telescope tube assembly construction. The design was created in 1935 by engineer Mark U. Serrurier when he was working on the Mount Palomar 200 in (5.1 m) Hale Telescope. [1]
This category is for articles about components of optical telescopes The main article for this category is List of telescope parts and construction . See also Category:Telescope instruments
F42 Mount, telescope, M2 (for 75mm mortar carriage, M1); Telescope, elbow, M3 (for 75mm mortar carriage, M1) – Parts and equipment F43 Sight, M1912, 2.95-inch mountain gun – Parts and equipment F44 Altimeter, M1917, M1920.
A large German equatorial mount on the Forststernwarte Jena 50cm Cassegrain reflector telescope.. An equatorial mount is a mount for instruments that compensates for Earth's rotation by having one rotational axis, called polar axis, parallel to the Earth's axis of rotation.
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