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Red River, rivers, United States and Canada

(Encyclopedia)Red River. 1 River, 1,222 mi (1,967 km) long, southernmost of the large tributaries of the Mississippi River. It rises in two branches in the Texas Panhandle and flows SE between Texas and Oklahoma an...

Wilson, Charles Thomson Rees

(Encyclopedia)Wilson, Charles Thomson Rees, 1869–1959, Scottish physicist, educated at Manchester and Cambridge universities. He was Jacksonian professor of natural philosophy at Cambridge from 1925 to 1934. Note...

clipper

(Encyclopedia)clipper, type of sailing ship, designed for speed. Long and narrow, the clipper had the greatest beam aft of the center; the bow cleaved the waves; and the ship carried, besides topgallant and royal s...

comet

(Encyclopedia)CE5 Comet: Whatever the direction of a comet's flight, its “tail” always points away from the sun. The tail disappears when the comet is far from the sun. comet [Gr.,=longhaired], a small cele...

Aorangi, Mount

(Encyclopedia)Aorangi, Mount ouräkˈē [key] [both: Maori,=cloud in the sky], or Mount Cook, 12,254 ft (3,735 m) high, on the South Island, New Zealand, in the Southern Alps; highest peak of New Zealand. Several g...

Waubeshiek

(Encyclopedia)Waubeshiek wôˈbəshēk [key], c.1794–c.1841, Native North American prophet, also known as White Cloud. He was a friend and adviser of Black Hawk and by prophesying victory was chiefly responsible ...

brown dwarf

(Encyclopedia)brown dwarf, in astronomy, celestial body that is larger than a planet but does not have sufficient mass to convert hydrogen into helium via nuclear fusion as stars do. Also called “failed stars,”...

Cotswold Hills

(Encyclopedia)Cotswold Hills kŏtˈswōld [key], range, mainly in Gloucestershire, W England, extending c.50 mi (80 km) NE from Bath; Cleeve Cloud (c.1,080 ft/330 m) is the highest point. Its crest line forms the T...

Horsehead Nebula

(Encyclopedia)Horsehead Nebula, dark nebula located in the constellation Orion; designated IC 434 or B 33. It consists of a cloud of nonluminous interstellar matter resembling the outline of a horse's head and appe...

aureole, in physics

(Encyclopedia)aureole ôrˈēōlˌ [key], in physics, luminous circle seen when the sun or other bright light is observed through a diffuse medium, i.e., smoke, thin cloud, fog, haze, or mist. It sometimes occurs a...