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Halley's Comet is the only known short-period comet that is consistently visible to the naked eye from Earth, [16] appearing every 75–79 years. [1] It last appeared in the inner parts of the Solar System in 1986 and will next appear in mid-2061. Officially designated 1P/Halley, it is also commonly called Comet Halley, or sometimes simply Halley .
Comet. A comet is an icy, small Solar System body that warms and begins to release gases when passing close to the Sun, a process called outgassing. This produces an extended, gravitationally unbound atmosphere or coma surrounding the nucleus, and sometimes a tail of gas and dust gas blown out from the coma.
Coma (comet) The coma is the nebulous envelope around the nucleus of a comet, formed when the comet passes near the Sun in its highly elliptical orbit. As the comet warms, parts of it sublimate; [1] this gives a comet a diffuse appearance when viewed through telescopes and distinguishes it from stars. The word coma comes from the Greek κόμη ...
Comet designed the 7-cylinder radial series to take advantage of the boom in private aviation in the late 1920s; intending to replace the large number of relatively unreliable wartime surplus engines that flooded the market in the early 1920s. First produced by the Aircraft Engine Corporation of Oakland, California, new interests acquired the ...
Norwish amateur astronomer Knut B. Aarseth discovered a diffuse object near Iota Coronae Borealis on 16 November 1989 with his 14-cm reflector during his comet searching routine. He estimated it had a magnitude of 8.5. American astronomer Howard J. Brewington found the comet independently a few hours later with his 40-cm reflector while looking ...
This is a list of comets (bodies that travel in elliptical, parabolic, and sometimes hyperbolic orbits and display a tail behind them) listed by type. Comets are sorted into four categories: periodic comets (e.g. Halley's Comet), non-periodic comets (e.g. Comet Hale–Bopp), comets with no meaningful orbit (the Great Comet of 1106), and lost comets (), displayed as either P (periodic), C (non ...
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