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Pluto, in astronomy
(Encyclopedia)Pluto, in astronomy, a dwarf planet and the first Kuiper belt, or transneptunian, object (see comet) to be discovered (1930) by astronomers. Pluto has an elliptical orbit usually lying beyond that of ...South African literature
(Encyclopedia)South African literature, literary works written in South Africa or written by South Africans living in other countries. Populated by diverse ethnic and language groups, South Africa has a distinctive...exploration
(Encyclopedia)exploration, travel to a part of the earth that is relatively unknown to the traveler's culture, historically often motivated by a desire for colonization, conquest, or trade. See also space explorati...oil industry
(Encyclopedia)oil industry, the business of discovering oil (petroleum), extracting it from the ground, refining it into a variety of products, and distributing it to the public. The development of the oil industry...Tibetan Buddhism
(Encyclopedia)Tibetan Buddhism, form of Buddhism prevailing in the Tibet region of China, Bhutan, the state of Sikkim in India, Mongolia, and parts of Siberia and SW China. It has sometimes been called Lamaism, fro...energy, sources of
(Encyclopedia)energy, sources of, origins of the power used for transportation, for heat and light in dwelling and working areas, and for the manufacture of goods of all kinds, among other applications. The develop...planetary system
(Encyclopedia)planetary system, a star and all the celestial bodies bound to it by gravity, especially planets and their natural satellites. Until the last decade of the 20th cent., the only planetary system known ...gravitation
(Encyclopedia)gravitation, the attractive force existing between any two particles of matter. The term gravitygravity is commonly used synonymously with gravitation, but in correct usage a definite distinction is...housing
(Encyclopedia)housing, in general, living accommodations available for the inhabitants of a community. Throughout the 19th cent., with the advent of the Industrial Revolution, housing as a problem worsened as urban...mining
(Encyclopedia)mining, extraction of solid mineral resources from the earth. These resources include ores, which contain commercially valuable amounts of metals, such as iron and aluminum; precious stones, such as d...Browse by Subject
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