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ertaining to Copernicus, a Prussian by birth (b. 1473, d. 1543), who taught the world the solar system now received, called the Copernican system.

The principal gaseous substance forming the solar corona, characterized by a green line in the coronal spectrum.

Pertaining to the solar system as a whole, and not to the earth alone.

me day of the year; -- so called from Meton, who first proposed it. -- Cycle of the sun, Solar cycle, a period of 28 years, at the end of which time the days of the month return to the same days of the week. The dominical or Sunday letter follows the same order; hence the solar cycle is also called the cycle of the Su…

l between two successive transits of the sun's center over the same meridian) is called a solar day; if it is a star, a sidereal day; if it is the moon, a lunar day. See Civil day, Sidereal day, below.

ar be G, F will be the dominical letter for the next year. Called also Sunday letter. Cf. Solar cycle, under Cycle, n.

inated by it. A lunar eclipse is caused by the moon passing through the earth's shadow; a solar eclipse, by the moon coming between the sun and the observer. A satellite is eclipsed by entering the shadow of its primary. The obscuration of a planet or star by the moon or a planet, though of the nature of an eclipse, is…

from the node, within which, if the moon happens to be at full, it will be eclipsed. -- Solar ecliptic limit, the space of 17º from the lunar node, within which, if a conjunction of the sun and moon occur, the sun will be eclipsed.

the last new moon has preceded the beginning of the year. Annual epact, the excess of the solar year over the lunar year, -- being eleven days. -- Menstrual epact, or Monthly epact, the excess of a calendar month over a lunar.

nd. -- Equation clock or watch, a timepiece made to exhibit the differences between mean solar and apparent solar time. Knight. -- Normal equation. See under Normal. -- Personal equation (Astron.), the difference between an observed result and the true qualities or peculiarities in the observer; particularly the dif…

he field of Greek mythology . . . the favorite sporting ground of the exclusivists of the solar theory. Gladstone.

A symbol of the solar deity, found on monuments exhumed in Babylon, Nineveh, etc.

ode rays are focused upon the anticathode, for intensifying the effect. -- Principal, or Solar, focus (Opt.), the focus for parallel rays.

The lines of the spectrun; especially and properly, the dark lines of the solar spectrum, so called because first accurately observed and interpreted by Fraunhofer, a German physicist.

Having the color of grass when fresh and growing; resembling that color of the solar spectrum which is between the yellow and the blue; verdant; emerald.

cluding the method of adjusting the leap years so as to harmonize the civil year with the solar, and also the regulation of the time of Easter and the movable feasts by means of epochs. See Gregorian year (below). -- Gregorian chant (Mus.), plain song, or canto fermo, a kind of unisonous music, according to the eight…

A lunisolar calendar of India, according to which the year is divided into twelve months, with an extra month inserted after every month in which two new moons occur (once in three years). The intercalary month has the name of the one which precedes it. The year usually commences about April 11. The months are follows:…

marked; the dial. Locke. -- Sidereal hour, the twenty-fourth part of a sidereal day. -- Solar hour, the twenty-fourth part of a solar day. -- The small hours, the early hours of the morning, as one o'clock, two o'clock, etc. -- To keep good hours, to be regular in going to bed early.

artichoke Etym: [Perh. a corrupt. of It. girasole i.e., sunflower, or turnsole. See Gyre, Solar.] (Bot.) (a) An American plant, a perennial species of sunflower (Helianthus tuberosus), whose tubers are sometimes used as food. (b) One of the tubers themselves. -- Jerusalem cherry (Bot.), the popular name of either of e…

A lunisolar calendar in use among Hebraic peoples, reckoning from the year 3761 b. c., the date traditionally given for the Creation. It received its present fixed form from Hillel II. about 360 a. d. The present names of the months, which are Babylonian- Assyrian in origin, replaced older ones, Abib, Bul, etc., at the…