sidereal astronomy

sidereal astronomy
noun
: a branch of astronomy that treats of the origin, nature, and relationship of the stars including the nebulas

Useful english dictionary. 2012.

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  • Astronomy — • Divided into two main branches, astrometry and astrophysics; the former concerned with determining the places of the investigation of the heavenly bodies, the latter, with the investigation of their chemical and physical nature Catholic… …   Catholic encyclopedia

  • Sidereal — Si*de re*al, a. [L. sidereus, from sidus, sideris, a constellation, a star. Cf. {Sideral}, {Consider}, {Desire}.] 1. Relating to the stars; starry; astral; as, sidereal astronomy. [1913 Webster] 2. (Astron.) Measuring by the apparent motion of… …   The Collaborative International Dictionary of English

  • Sidereal clock — Sidereal Si*de re*al, a. [L. sidereus, from sidus, sideris, a constellation, a star. Cf. {Sideral}, {Consider}, {Desire}.] 1. Relating to the stars; starry; astral; as, sidereal astronomy. [1913 Webster] 2. (Astron.) Measuring by the apparent… …   The Collaborative International Dictionary of English

  • sidereal — adjective /saɪˈdɪəriəl,saɪˈdɪriəl,səˈdɪriəl/ a) Of or relating to the stars. The field of sidereal astronomy, therefore, was virtually untrodden when, shortly after the beginning of his telescopic work, Herschel began his first review of the… …   Wiktionary

  • Sidereal time — is a measure of the position of the Earth in its rotation around its axis, or time measured by the apparent diurnal motion of the vernal equinox, which is very close to, but not identical to, the motion of stars. They differ by the precession of… …   Wikipedia

  • Sidereal astrology — is the system of astrology used by some Western and all Jyotish astrologers who base their interpretation around the use of the sidereal zodiac. Its primary feature is that the signs of the zodiac align to the sky constellations of the same name …   Wikipedia

  • Astronomy in the Bible — • Includes examples of Old and New Testament references Catholic Encyclopedia. Kevin Knight. 2006. Astronomy in the Bible     Astronomy in the Bible      …   Catholic encyclopedia

  • Sidereal year — The sidereal year is the time taken for the Sun to return to the same position with respect to the stars of the celestial sphere. It is the orbital period of Earth, equal to 365.25636042 mean solar days (31,558,149.540 seconds), that is… …   Wikipedia

  • sidereal day —    a unit of time used in astronomy, equal to the period of time in which the earth makes one rotation relative to the stars. If we could view the earth from outside the Solar System, we would see that it actually completes 366.242 rotations… …   Dictionary of units of measurement

  • sidereal time — Astron. time measured by the diurnal motion of stars. A sidereal day is about four minutes shorter than a solar day, with hours, minutes, and seconds all proportionally shorter. [1805 15] * * * ▪ astronomy       time as measured by the apparent… …   Universalium

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