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Young, Edward
(Encyclopedia)Young, Edward, 1683–1765, English poet and dramatist. After a disappointing political life he took holy orders about 1724, serving for a time as the royal chaplain before becoming rector of Welwyn i...catholic church
(Encyclopedia)catholic church [Gr.,=universal], the body of Christians, living and dead, considered as an organization. The word catholic was first used c.110 to describe the Church by St. Ignatius of Antioch. In s...Cartwright, John
(Encyclopedia)Cartwright, John, 1740–1824, English reformer and pamphleteer; brother of Edmund Cartwright. He had an early career in the navy. He declined to fight the American colonists and wrote American Indepe...Bradley, Francis Herbert
(Encyclopedia)Bradley, Francis Herbert, 1846–1924, English philosopher. He was educated at Oxford, where he became a fellow of Merton College in 1876. His works include Ethical Studies (1876), Principles of Logic...Lundy, Benjamin
(Encyclopedia)Lundy, Benjamin, 1789–1839, American abolitionist, b. Sussex co., N.J., of Quaker parentage. A pioneer in the antislavery movement, Lundy founded (1815) the Union Humane Society while operating a sa...Universal Postal Union
(Encyclopedia)Universal Postal Union (UPU), specialized agency of the United Nations since 1948, with headquarters at Bern, Switzerland. Established in 1875 following adoption of the Universal Postal Convention, it...space-time
(Encyclopedia)space-time, central concept in the theory of relativity that replaces the earlier concepts of space and time as separate absolute entities. In relativity one cannot uniquely distinguish space and time...solar time
(Encyclopedia)solar time, time defined by the position of the sun. The solar day is the time it takes for the sun to return to the same meridian in the sky. Local solar time is measured by a sundial. When the cente...sidereal time
(Encyclopedia)sidereal time (ST), time measured relative to the fixed stars; thus, the sidereal day is the period during which the earth completes one rotation on its axis so that some chosen star appears twice on ...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...Browse by Subject
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