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ether, in physics and astronomy

(Encyclopedia)ether or aether, in physics and astronomy, a hypothetical medium for transmitting light and heat (radiation), filling all unoccupied space; it is also called luminiferous ether. In Newtonian physics a...

star

(Encyclopedia)star, hot incandescent sphere of gas, held together by its own gravitation, and emitting light and other forms of electromagnetic radiation whose ultimate source is nuclear energy. The universe co...

friction

(Encyclopedia)friction, resistance offered to the movement of one body past another body with which it is in contact. In certain situations friction is desired. Without friction the wheels of a locomotive could not...

Hearst, William Randolph

(Encyclopedia)Hearst, William Randolph, 1863–1951, American journalist and publisher, b. San Francisco. A flamboyant, highly controversial figure, Hearst was nonetheless an intelligent and extremely competent new...

diffusion

(Encyclopedia)diffusion, in chemistry, the spontaneous migration of substances from regions where their concentration is high to regions where their concentration is low. Diffusion is important in many life process...

Hollywood

(Encyclopedia)Hollywood. 1 Community (2020 population 35,757) within the city of Los Angeles, S Calif., on the slopes of the Santa Monica Mts.; inc. 1903, ...

Halley, Edmond

(Encyclopedia)Halley, Edmond hălˈē, hôˈlē [key], 1656–1742, English astronomer and mathematician. He is particularly noted as the first astronomer to predict the return of a comet and the first to point out...

Streep, Meryl

(Encyclopedia)Streep, Meryl, 1949–, American actress, b. Summit, N.J., as Mary Louise Streep. She attended Yale Drama School and appeared in many Broadway and off-Broadway productions during the early 1970s. Movi...

differential

(Encyclopedia)differential, in the automobile, a set of gears used on the driving (usually rear) axle. The two wheels on the driving axle must be interconnected in order to receive their energy from the same source...

minstrel show

(Encyclopedia)minstrel show, stage entertainment by white performers made up as blacks. Thomas Dartmouth Rice, who gave (c.1828) the first solo performance in blackface and introduced the song-and-dance act Jim Cro...