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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...

Hasselmann, Klaus

(Encyclopedia)Hasselmann, Klaus, 1931–, b. Hamburg, Germany. German climate scientist and oceanographer. Hasselmann is the founder and former director of the Max ...

Penza

(Encyclopedia)Penza pyĕnˈzə [key], city (1991 est. pop. 551,000), capital of Penza region, S central European Russia, on the Sura River. It is a large railroad junction and the center of an extensive and fertile...

Phaëthon

(Encyclopedia)Phaëthon fāˈətən [key], in Greek mythology, son of Helios and the nymph Clymene. He tried to drive his father's golden chariot, but he could not control its great steeds. As the chariot plunged t...

Yggdrasill

(Encyclopedia)Yggdrasill ĭgˈdrəsĭl, yo͞ogˈ– [key], in Norse mythology, the great tree of the world. Its branches and roots extended through all the universe—the heavens, the earth, and the underworld. At ...

Ceres, in Roman religion and mythology

(Encyclopedia)Ceres sîrˈēz [key], in Roman religion and mythology, goddess of grain; daughter of Saturn and Ops. She was identified by the Romans with the Greek Demeter. Her worship was connected with that of th...

barrow, in archaeology

(Encyclopedia)barrow, in archaeology, a burial mound. Earth and stone or timber are the usual construction materials; in parts of SE Asia stone and brick have entirely replaced earth. A barrow built primarily of st...

geyser

(Encyclopedia)geyser gīˈzər [key] [Icel.], hot spring from which water and steam are ejected periodically to heights ranging from a few to several hundred feet. Notable geysers are found in Iceland, New Zealand,...

Osiris

(Encyclopedia)Osiris ōsīˈrĭs [key], in Egyptian religion, legendary ruler of predynastic Egypt and god of the underworld. He was the son of the sky goddess Nut and the earth god Geb. The great benefactor of man...

subduction zone

(Encyclopedia)subduction zone, large-scaled narrow region in the earth's crust where, according to plate tectonics, masses of the spreading oceanic lithosphere bend downward into the earth along the leading edges o...