- Great Red Spot
See Red Spot.
* * *Storm on the planet Jupiter that moves in longitude but remains centred at about latitude 22° south.A high-pressure centre, it is oval, measuring about 7,500 mi (12,000 km) north to south, roughly the diameter of Earth, and nearly twice as wide east to west. Its discovery in the 1660s is attributed to Gian Domenico Cassini or Robert Hooke. Its colour, whose cause is unknown, varies from brick-red to brownish; it tends to change colour over a period of years.
* * *▪ storm system, Jupiteran enormous, long-lived storm system on the planet Jupiter and the most conspicuous feature of its visible cloud surface. It is generally reddish in colour and oval in shape, approximately 20,000 km long and 12,000 km wide (12,400 by 7,500 miles)—large enough to engulf Earth and Mars side by side. It moves in longitude with respect to the clouds as Jupiter rotates but remains centred at about latitude 22° S.The Great Red Spot was discovered in 1664 by the English scientist Robert Hooke (Hooke, Robert) with the aid of one of the earliest telescopes, and it has existed at least since that time. Detailed observations and measurements have been made by the Voyager and Galileo spacecraft. Seen through telescopes from Earth, it varies in colour from year to year from salmon-red to gray, when it may blend indistinguishably into the colouring of the surrounding cloud belts. High-resolution spacecraft pictures revealed that the feature's pinkish cloud layer can be overlain from time to time by high-altitude white clouds, producing the gray impression seen from Earth.Meteorologically, the Great Red Spot is an anticyclonic circulation system—i.e., a high-pressure centre in the planet's southern hemisphere. Cameras carried by the Voyager 1 and 2 spacecraft revealed in 1979 that the entire system rotates counterclockwise with a period of about seven days, corresponding to wind velocities at its periphery of 400 km (250 miles) per hour. The source of the red coloration is unknown; suggestions range from compounds of sulfur and phosphorus to organic material, any of which could be produced by lightning discharges or by high-altitude, photochemical reactions. The Great Red Spot extends well above Jupiter's main cloud layers.The Great Red Spot is not anchored to any solid surface feature—Jupiter is most likely fluid throughout. Instead, it may well be the equivalent of a gigantic hurricane, powered by the condensation of water, ammonia, or both at lower levels in Jupiter's atmosphere. Alternatively, it may draw its energy from the smaller eddies that merge with it or from the high-speed currents on either side of it. Its remarkable longevity is undoubtedly a result of its size, but an exact theory that explains both its source of energy and its stability remains to be developed.
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Great Red Spot — Astron. See Red Spot. * * * Astronomy a weather system on the planet Jupiter which measures over 6,200 miles (10,000 km) across and has persisted at least since the beginning of telescopic observations … Useful english dictionary
Great Red Spot — noun a giant anticyclonic storm on the planet Jupiter; first observed about 1665 … Wiktionary
The Great Red Spot — Эту статью следует викифицировать. Пожалуйста, оформите её согласно правилам оформления статей … Википедия
Great Dark Spot — The Great Dark Spot as seen from Voyager 2 The Great Dark Spot (also known as GDS 89) is the name given to a series of dark spots on Neptune similar in appearance to Jupiter s Great Red Spot. The first one was observed in 1989 by NASA s … Wikipedia
Great White Spot — The Great White Spot, also known as Great White Oval, on Saturn, named by analogy from Jupiter s Great Red Spot, is a name given to periodic storms that are large enough to be visible by telescope from Earth by their characteristic white… … Wikipedia
Red spot — can refer to either of two massive cyclones in the southern hemisphere of the planet Jupiter:*The Great Red Spot, which is three times the size of Earth, and has lasted for at least 175 years*Oval BA (aka Red Spot Jr. or Little Red Spot), formed… … Wikipedia
Red spot jr. — Oval BA Photographie d une partie de la zone située au sud de l équateur de Jupiter. Oval BA est visible en bas à gauche de l image ; la grande tache rouge est située à vers le centre, à droite. Oval BA est le deuxième plus grand vortex… … Wikipédia en Français
Red spot junior — Oval BA Photographie d une partie de la zone située au sud de l équateur de Jupiter. Oval BA est visible en bas à gauche de l image ; la grande tache rouge est située à vers le centre, à droite. Oval BA est le deuxième plus grand vortex… … Wikipédia en Français
Red Spot — Astron. a large, usually reddish gaseous vortex on the surface of Jupiter, about 14,000 by 30,000 km, that drifts about slowly as the planet rotates and has been observed for several hundred years. Also called Great Red Spot. [1875 80] * * * … Universalium
Red Spot — Astron. a large, usually reddish gaseous vortex on the surface of Jupiter, about 14,000 by 30,000 km, that drifts about slowly as the planet rotates and has been observed for several hundred years. Also called Great Red Spot. [1875 80] … Useful english dictionary