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Astronomic :: Astronomic (a.) Astronomical.

Libration Point :: Libration point (n.) any one of five points in the plane of a system of two large astronomical bodies orbiting each other, as the Earth-moon system, where the gravitational pull of the two bodies on an object are approximately equal, and in opposite directions. A solid object moving in the same velocity and direction as such a libration point will remain in gravitational equilibrium with the two bodies of the system and not fall toward either body..

Uranic :: Uranic (a.) Of or pertaining to the heavens; celestial; astronomical.

Flexure :: Flexure (n.) The small distortion of an astronomical instrument caused by the weight of its parts; the amount to be added or substracted from the observed readings of the instrument to correct them for this distortion.

Gastronomic :: Gastronomic (a.) Alt. of Gastronomica.

Sphere :: Sphere (n.) The apparent surface of the heavens, which is assumed to be spherical and everywhere equally distant, in which the heavenly bodies appear to have their places, and on which the various astronomical circles, as of right ascension and declination, the equator, ecliptic, etc., are conceived to be drawn; an ideal geometrical sphere, with the astronomical and geographical circles in their proper positions on it..

Ephemeris :: Ephemeris (n.) A publication giving the computed places of the 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..

Ptolemaist :: Ptolemaist (n.) One who accepts the astronomical system of Ptolemy.

Venus :: Venus (n.) The metal copper; -- probably so designated from the ancient use of the metal in making mirrors, a mirror being still the astronomical symbol of the planet Venus..

Observer :: Observer (n.) One who observes, or pays attention to, anything; especially, one engaged in, or trained to habits of, close and exact observation; as, an astronomical observer..

Ecliptic :: Ecliptic (a.) A great circle drawn on a terrestrial globe, making an angle of 23¡ 28' with the equator; -- used for illustrating and solving astronomical problems..

Autumn :: Autumn (n.) The third season of the year, or the season between summer and winter, often called the fall. Astronomically, it begins in the northern temperate zone at the autumnal equinox, about September 23, and ends at the winter solstice, about December 23; but in popular language, autumn, in America, comprises September, October, and November..

Gastronomical :: Gastronomical (a.) Pertaining to gastromony.

Refraction :: Refraction (n.) The change in the direction of a ray of light, and, consequently, in the apparent position of a heavenly body from which it emanates, arising from its passage through the earth's atmosphere; -- hence distinguished as atmospheric refraction, or astronomical refraction..

Dog Star :: Dog Star () Sirius, a star of the constellation Canis Major, or the Greater Dog, and the brightest star in the heavens; -- called also Canicula, and, in astronomical charts, / Canis Majoris. See Dog days..

Almanac :: Almanac (n.) A book or table, containing a calendar of days, and months, to which astronomical data and various statistics are often added, such as the times of the rising and setting of the sun and moon, eclipses, hours of full tide, stated festivals of churches, terms of courts, etc..

Chronometer :: Chronometer (n.) A portable timekeeper, with a heavy compensation balance, and usually beating half seconds; -- intended to keep time with great accuracy for use an astronomical observations, in determining longitude, etc..

Rudolphine :: Rudolphine (a.) Pertaining to, or designating, a set of astronomical tables computed by Kepler, and founded on the observations of Tycho Brahe; -- so named from Rudolph II., emperor of Germany..

Almagest :: Almagest (n.) The celebrated work of Ptolemy of Alexandria, which contains nearly all that is known of the astronomical observations and theories of the ancients. The name was extended to other similar works..

Regulator :: Regulator (n.) A clock, or other timepiece, used as a standard of correct time. See Astronomical clock (a), under Clock..

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