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rinciples by which their motions are regulated, with their various phenomena. An undevout astronomer is mad. Young.

One fond of good living; an epicure. Sir W. Scott.

, and even of apparent friendship. Macaulay. What Berkeley calls visible magnitude was by astronomers called apparent magnitude. Reid. Apparent horizon, the circle which in a level plain bounds our view, and is formed by the apparent meeting of the earth and heavens, as distinguished from the rational horizon. -- Appa…

One who studies the stars; an astronomer. [Obs.]

Of or pertaining to Calippus, an Athenian astronomer. Calippic period, a period of seventy-six years, proposed by Calippus, as an improvement on the Metonic cycle, since the 6940 days of the Metonic cycle exceeded 19 years by about a quarter of a day, and exceeded 235 lunations by something more.

The Celsius thermometer or scale, so called from Anders Celsius, a Swedish astronomer, who invented it. It is the same as the centigrade thermometer or scale.

e heavenly bodies for each day of the year, with other numerical data, for the use of the astronomer and navigator; an astronomical almanac; as, the "American Ephemeris and Nautical Almanac."

es the body of the planet fastened to it round its proper center. The schoolmen were like astronomers which did feign eccentries, and epicycles, and such engines of orbs. Bacon.

Pertaining to, or invented by, Christian Huyghens, a Dutch astronomer of the seventeenth century; as, the Huyghenian telescope. Huyghenian eyepieceSee under Eyepiece.

etween Pennsylvania and Maryland, as run before the Revolution (1764-1767) by two English astronomers named Charles Mason and Jeremiah Dixon. In an extended sense, the line between the free and the slave States. -- On the line, on a level with the eye of the spectator; -- said of a picture, as hung in an exhibition of…

ear to year approaching slowly nearer to it. It is called also Cynosura, polestar, and by astronomers, Polaris.

orbit, described by the revolution of a heavenly body; an orbit. The schoolmen were like astronomers, which did feign eccentrics, and epicycles, and such engines of orbs. Bacon. You seem to me as Dian in her orb. Shak. In orbs Of circuit inexpressible they stood, Orb within orb. Milton.

Of or pertaining to Ptolemy, the geographer and astronomer. Ptolemaic system (Astron.), the system maintained by Ptolemy, who supposed the earth to be fixed in the center of the universe, with the sun and stars revolving around it. This theory was received for ages, until superseded by the Copernican system.…

One who gazes at the stars; an astrologer; sometimes, in derision or contempt, an astronomer.