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Roche limit

(Encyclopedia)Roche limit, the closest distance that a celestial body held together only by its own gravity can come to a planet without being pulled apart by the planet's tidal (gravitational) force. This distance...

Shanxi

(Encyclopedia)Shanxi or Shansi shänˈshēˈ [key], province (2010 pop. 35,712,111), c.60,000 sq mi (155,400 sq km), NE China. The capital is Taiyuan. It is bounded on the west and the south by the Huang He (Yellow...

phase, in astronomy

(Encyclopedia)CE5 Phases of the moon phase, in astronomy, the measure of how much of the illuminated surface of a planet or satellite can be seen from a point at a distance from that body; the term is most ofte...

Struve

(Encyclopedia)Struve shtro͞oˈvə [key], family of astronomers. Friedrich Georg Wilhelm von Struve, 1793–1864, was born in Germany but later lived in Russia. While director (1817–39) of Dorpat Observatory he w...

Arras

(Encyclopedia)Arras äräsˈ [key], city, capital of Pas-de-Calais dept., and historic capital of Artois, N France, on the canalized Scarpe River. It is a communications, farm, and indu...

Mosby, John Singleton

(Encyclopedia)Mosby, John Singleton môzˈbē [key], 1833–1916, Confederate partisan leader in the American Civil War, b. Edgemont, Va. He was practicing law in Bristol, Va., when the Civil War broke out. Mosby s...

Harare

(Encyclopedia)Harare həˈrärā [key], formerly Salisbury, city (1992 est. pop. 1,485,615), alt. 4,865 ft (1,483 m), capital of Zimbabwe, NE Zimbabwe. Harare is Zimbabwe's largest city and its administrative, comm...

Hudson, towns, United States

(Encyclopedia)Hudson. 1 Industrial town (2020 pop. 20,092), Middlesex co., E central Mass., on the Assabet River, in an apple-growing region; settled c.1699, ...

Colima, state, Mexico

(Encyclopedia)Colima kōlēˈmä [key], state, 2,010 sq mi (5,206 sq km), SW Mexico, on the Pacific Ocean. ...