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Sidereal   Listen
adjective
Sidereal  adj.  
1.
Relating to the stars; starry; astral; as, sidereal astronomy.
2.
(Astron.) Measuring by the apparent motion of the stars; designated, marked out, or accompanied, by a return to the same position in respect to the stars; as, the sidereal revolution of a planet; a sidereal day.
Sidereal clock, Sidereal day, Sidereal month, Sidereal year. See under Clock, Day, etc.
Sideral time, time as reckoned by sideral days, or, taking the sidereal day as the unit, the time elapsed since a transit of the vernal equinox, reckoned in parts of a sidereal day. This is, strictly, apparent sidereal time, mean sidereal time being reckoned from the transit, not of the true, but of the mean, equinoctial point.






Collaborative International Dictionary of English 0.48








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"Sidereal" Quotes from Famous Books



... Beongfallong, the great astronomer, who is studying the sidereal spheres from his attic window in the Rue de Bologny, shudders as he turns his telescope upon the solitary figure upon ...
— Rolling Stones • O. Henry

... extension of its area of cultivation which our age has witnessed. In the last century its purview was a comparatively narrow one. Problems lying beyond the range of the solar system were almost unheeded, because they seemed inscrutable. Herschel first showed the sidereal universe as accessible to investigation, and thereby offered to science new worlds—majestic, manifold, "infinitely infinite" to our apprehension in number, variety, and extent—for future conquest. Their gradual appropriation has absorbed, and will long continue to absorb, the powers ...
— A Popular History of Astronomy During the Nineteenth Century - Fourth Edition • Agnes M. (Agnes Mary) Clerke

... a result we can read much more inscription and make out many more details of the mechanism. The cleaning and disentangling of the fragments by the museum staff has proceeded to the stage where one can assert much more positively that the device was an astronomical computer for sidereal, solar, lunar, and possibly also planetary phenomena. (See my article in the Scientific American, June 1959, vol. 200, No. 6, pp. 60-67.) Relevant to the present study, it must also be noted at this point that ...
— On the Origin of Clockwork, Perpetual Motion Devices, and the Compass • Derek J. de Solla Price

... watches with protecting radiance over her slumbers. C reckons the intervening 238,000 miles, its diameter of 2,162.3 miles, and his mind busies itself with orbits, radii, ellipses, eclipses, azimuth, parallax, sidereal periods, satellitic inclinations, and synodic revolutions. D, with a turn for symbols and history, sees in it something of the "ornaments like the moon" that Gideon captured from the Sheikhs Zebah and Zalmunna, something ...
— Southern Literature From 1579-1895 • Louise Manly

... that Lisbeth and Valerie had contrived a powerful piece of machinery which tended to this result. Marneffe, as he saw his wife improved in beauty by the setting in which she was enthroned, like the sun at the centre of the sidereal system, appeared, in the eyes of the world, to have fallen in love with her again himself; he was quite crazy about her. Now, though his jealousy made him somewhat of a marplot, it gave enhanced value to Valerie's favors. Marneffe ...
— Cousin Betty • Honore de Balzac


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