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charter

(Encyclopedia)charter, document granting certain rights, powers, or functions. It may be issued by the sovereign body of a state to a local governing body, university, or other corporation or by the constituted aut...

X-ray astronomy

(Encyclopedia)X-ray astronomy, study of celestial objects by means of the X rays they emit, in the wavelength range from 0.01 to 10 nanometers. X-ray astronomy dates to 1949 with the discovery that the sun emits X ...

Covent Garden

(Encyclopedia)Covent Garden kŭvˈənt [key], area in London historically containing the city's principal fruit and garden market and the Royal Opera House. The market was established in 1671 by Charles II on the s...

Powell, Dawn

(Encyclopedia)Powell, Dawn, 1896–1965, American novelist, b. Mt. Gilead, Ohio. She came to New York City in 1918 and settled several years later in Greenwich Village, where she spent most of the rest of her life ...

standard time

(Encyclopedia)standard time, civil time used within a given time zone. The earth is divided into 24 time zones, each of which is about 15° of longitude wide and corresponds to one hour of time. Within a zone all c...

Keeling, Charles David

(Encyclopedia)Keeling, Charles David, 1928–2005, U.S. geochemist, b. Scranton, Pa., Ph.D. Northwestern Univ., 1954. As a postdoctoral fellow at the California Institute of Technology (1953–56), he developed a s...

Mayer, Johann Tobias

(Encyclopedia)Mayer, Johann Tobias yōˈhän tōbēˈäs mīˈər [key], 1723–62, German mathematician and astronomer. In 1751 he became professor of economics and mathematics at the Univ. of Göttingen, and in 1...

Argelander, Friedrich Wilhelm August

(Encyclopedia)Argelander, Friedrich Wilhelm August frēˈdrĭkh vĭlˈhĕlm ouˈgo͝ost ärˈgəländər [key], 1799–1875, German astronomer. He became director of the observatory at the Univ. of Bonn in 1837 and...

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...

San Gabriel Mountains

(Encyclopedia)San Gabriel Mountains, S Calif., E and NE of Los Angeles, running c.50 mi (80 km) westward from Cajon Pass. Mt. San Antonio, also known as Mt. Baldy (10,080 ft/3,072 m), is the highest peak of the ran...