EQUATORIAL n.
each carrying a graduated circle, the one for measuring declination, and the other right ascension, or the hour angle, so that the telescope may be directed, even in the daytime, to any star or other object whose right ascension and declination are known. The motion in right ascension is sometimes communicated by cloc…
HOLY a.
), the blessed thistle. See under Thistle. -- Holy Thursday. (Eccl.) (a) (Episcopal Ch.) Ascension day. (b) (R. C. Ch.) The Thursday in Holy Week; Maundy Thursday. -- Holy war, a crusade; an expedition carried on by Christians against the Saracens in the Holy Land, in the eleventh, twelfth, and thirteenth centuries,…
OBLIQUE a.
ection in a direct line was strong, in an oblique but weak. Baker. Oblique angle, Oblique ascension, etc. See under Angle,Ascension, etc. -- Oblique arch (Arch.), an arch whose jambs are not at right angles with the face, and whose intrados is in consequence askew. -- Oblique bridge, a skew bridge. See under Bridge,…
OBSERVATION n.
table instruments, some magnitude, as the time of an occultation, with a clock; the right ascension of a star, with a transit instrument and clock; the sun's altitude, or the distance of the moon from a star, with a sextant; the temperature, with a thermometer, etc.
PLACE n.
Position in the heavens, as of a heavenly body; -- usually defined by its right ascension and declination, or by its latitude and longitude. Place of arms (Mil.), a place calculated for the rendezvous of men in arms, etc., as a fort which affords a safe retreat for hospitals, magazines, etc. Wilhelm. -- High place (Sc…
REFRACTION n.
the measurement of refraction. -- Refraction of latitude, longitude, declination, right ascension, etc., the change in the apparent latitude, longitude, etc., of a heavenly body, due to the effect of atmospheric refraction. -- Terrestrial refraction, the change in the apparent altitude of a distant point on or near…
SPHERE n. 2 definitions
s 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.