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motion

(Encyclopedia)motion, the change of position of one body with respect to another. The rate of change is the speed of the body. If the direction of motion is also given, then the velocity of the body is determined; ...

orbit

(Encyclopedia)CE5 Important points in a planet's orbit as seen from the earth orbit, in astronomy, path in space described by a body revolving about a second body where the motion of the orbiting bodies is domi...

Galileo

(Encyclopedia)Galileo (Galileo Galilei) gălˌĭlēˈō; gälēlĕˈō gälēlĕˈē [key], 1564–1642, great Italian astronomer, mathematician, and physicist. By his persistent investigation of natural laws he la...

husband and wife

(Encyclopedia)husband and wife, the legal aspects of the married state (for the sociological aspects, see marriage). The former Anglo-American law of marriage was chiefly characterized by the view that husband an...

Amis, Sir Kingsley

(Encyclopedia)Amis, Sir Kingsley āˈmĭs [key], 1922–95, English novelist. He attended St. John's College, Oxford (B.A., 1949) and for some 20 years taught at Oxford, Swansea, and Cambridge and in the United Sta...

Nerva

(Encyclopedia)Nerva (Marcus Cocceius Nerva) nûrˈvə [key], c.a.d. 30–a.d. 98, Roman emperor (a.d. 96–a.d. 98). He had an honorable career as a statesman at Rome, and his reputation was blameless. At the death...

Nicholas III, pope

(Encyclopedia)Nicholas III, d. 1280, pope (1277–80), a Roman named Giovanni Gaetano Orsini; successor of John XXI. As a cardinal he made a great reputation in diplomacy, and he was a close confidant of popes for ...

ephemeris time

(Encyclopedia)ephemeris time (ET), astronomical time defined by the orbital motions of the earth, moon, and planets. The earth does not rotate with uniform speed, so the solar day is an imprecise unit of time. Ephe...

Portland, William Henry Cavendish Bentinck, 3d duke of

(Encyclopedia)Portland, William Henry Cavendish Bentinck, 3d duke of, 1738–1809, British statesman; great-grandson of the 1st earl of Portland. He was lord lieutenant of Ireland (1782) and nominal head of the coa...

Ford, John, English dramatist

(Encyclopedia)Ford, John, 1586–c.1640, English dramatist, b. Devonshire. He went to London to study law but was never called to the bar. The early part of his playwriting career was taken up with collaborations, ...