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Otto I, Holy Roman emperor

(Encyclopedia)Otto I or Otto the Great, 912–73, Holy Roman emperor (962–73) and German king (936–73), son and successor of Henry I of Germany. He is often regarded as the founder of the Holy Roman Empire. Bol...

peri

(Encyclopedia)peri pērˈē [key], in Persian mythology, supernatural being. Peris were said to be fallen angels who were denied paradise until they did penance. Originally agents of evil, in later mythology they w...

space exploration

(Encyclopedia)CE5 Moon mission assembly CE5 Stages in a moon mission shown counterclockwise from launching on the first day to splashdown on the ninth day. space exploration, the investigation of physical co...

Lowell Observatory

(Encyclopedia)Lowell Observatory, astronomical observatory located in Flagstaff, Ariz.; it was founded in 1894 by Percival Lowell, the American astronomer who popularized the idea that Mars might support intelligen...

Schiaparelli, Giovanni Virginio

(Encyclopedia)Schiaparelli, Giovanni Virginio skyäpärĕlˈlē [key], 1835–1910, Italian astronomer. He was director (1862–1900) of the Brera Observatory, Milan. He is especially noted for having detected (18...

Flammarion, Camille

(Encyclopedia)Flammarion, Camille kämēˈyə flämäryôNˈ [key], 1842–1925, French astronomer and author. He served for some years at the Paris Observatory and the Bureau of Longitudes, and in 1883 he set up a...

meteorite

(Encyclopedia)meteorite, meteor that survives the intense heat of atmospheric friction and reaches the earth's surface. Because of the destructive effects of this friction, only the very largest meteors become mete...

Mössbauer, Rudolf Ludwig

(Encyclopedia)Mössbauer, Rudolf Ludwig, 1929–2011, German physicist, Ph.D. Max Planck Institute for Medical Research, Heidelberg, Germany, 1957. Mössbauer was a professor at the California Institute of Technolo...

Thetis

(Encyclopedia)Thetis thēˈtĭs [key], in Greek mythology, a nereid, mother of Achilles. She was loved by both Zeus and Poseidon, but because of a prophecy that her son would be greater than his father, the gods ga...

Montmorency, Anne, duc de

(Encyclopedia)Montmorency, Anne, duc de mŏntˌmərĕnˈsē, Fr. än dük də môNmôräNsēˈ [key], 1493?–1567, constable of France. He was made a marshal (1522) by Francis I, was captured with Francis at Pavia...