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Smaller planetarium projectors include a set of fixed stars, Sun, Moon, and planets, and various nebulae. Larger projectors also include comets and a far greater selection of stars. Additional projectors can be added to show twilight around the outside of the screen (complete with city or country scenes) as well as the Milky Way.
Walton was founded by S.M Nazrul Islam. Nazrul started his career as a small businessman. After the Bangladesh Liberation War of 1971, he started a separate business. In 1977, he founded a new company named after his eldest son S.M Nurul Alam Rezvi called Rezvi & Brothers, abbreviated as R.B. Group. [10]
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Closeup of a lens bearing sphere of the Zeiss Mark IV planetarium projector on display at the Nehru Planetarium in Mumbai, India. A Zeiss projector is one of a line of planetarium projectors manufactured by the Carl Zeiss Company. Main models include Copernican (1924), Model I (1925), Model II (1926), Model III (1957), Model IV (1957), Model V ...
Bangladesh Astronomical Association was established on 5 May 1988 in Dhaka by Bangladeshi astronomers. It organizes the Dhaka Mahakash Utsab (Dhaka space festival) biennially. The association publishes one academic journal and one bi-monthly magazine; which are respectively The Bangladesh Journal of Astronomical Research and Mahakash Barta.
NGC 7027 has a rich and highly ionized spectrum caused by its hot central star. [7] The progenitor star of NGC 7027 is believed to have been about 3 to 4 times the mass of the Sun before the nebula was formed. [7] It is possible that the central white dwarf of NGC 7027 has an accretion disk that acts as a source of high temperatures. [24]
N44 is an emission nebula with superbubble structure located in the Large Magellanic Cloud, a satellite galaxy of the Milky Way in the constellation Dorado. [ 3 ] [ 4 ] [ 5 ] Originally catalogued in Karl Henize 's "Catalogue of H-alpha emission stars and nebulae in the Magellanic Clouds" of 1956, it is approximately 1,000 light-years wide and ...
The star owes its name to the shape of the Pistol Nebula, which it illuminates. It is located approximately 25,000 light-years from Earth in the direction of Sagittarius . The star has a large mass comparable to V4998 Sagittarii and a luminosity 3.3 million times that of the Sun ( L ☉ ).