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Heraclitus

(Encyclopedia) HeraclitusHeraclitushĕrəklīˈtəs [key], c.535–c.475 b.c., Greek philosopher of Ephesus, of noble birth. According to Heraclitus, there was no permanent reality except the reality of…

Penzias, Arno Allan

(Encyclopedia) Penzias, Arno Allan, 1933–, German-American physicist, b. Munich, Germany, Ph.D. Columbia Univ., 1962. He fled Nazi Germany with his family and after finishing school began work at…

doll

(Encyclopedia) doll, small figure of a human being, usually used as a child's toy. The many types of dolls found among the relics of primitive peoples were cult objects. Egypt, Greece, and Rome have…

Ra, in Egyptian religion

(Encyclopedia) RaRarä [key] or ReRarā [key], in Egyptian religion, sun god, one of the most important gods of ancient Egypt. Ra was chief of the cosmic deities and was sometimes called the creator…

Bothe, Walther Wilhelm Georg

(Encyclopedia) Bothe, Walther Wilhelm Georg, 1891–1957, German physicist, Ph.D. Univ. of Berlin, 1923. Bothe was a researcher at the Reich Physical and Technical Institute (1913–30) and a professor…

solar wind

(Encyclopedia) solar wind, stream of ionized hydrogen—protons and electrons—with an 8% component of helium ions and trace amounts of heavier ions that radiates outward from the sun at high speeds.…

Teilhard de Chardin, Pierre

(Encyclopedia) Teilhard de Chardin, PierreTeilhard de Chardin, Pierrepyĕr tāyärˈ də shärdăNˈ [key], 1881–1955, French paleontologist and philosopher. He entered (1899) the Jesuit order, was ordained…

Kajita, Takaaki

(Encyclopedia) Kajita, Takaaki 1959–, Japanese physicist, Ph.D. Univ. of Tokyo, 1986. In 1988 he joined the faculty at the Univ. of Tokyo, where he is now professor and director of the Institute for…

immanence

(Encyclopedia) immanenceimmanenceĭmˈənəns [key] [Lat.,=dwelling in], in metaphysics, the presence within the natural world of a spiritual or cosmic principle, especially of the Deity. It is…

cosmology

(Encyclopedia) cosmology, area of science that aims at a comprehensive theory of the structure and evolution of the entire physical universe. The earliest pre-Ptolemaic theories assumed that the…