Sidereal year | Article about sidereal year by The Free Dictionary
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sidereal year


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Related to sidereal year: tropical year, anomalistic year

sidereal year

sidereal year, time required for the earth to complete an orbit of the sun relative to the stars. The sidereal year is 365 days, 6 hr, 9 min, 9.5 sec of mean solar time (see solar time). It is 20 min longer than the tropical year because of the precession of the equinoxes; for this reason, the sidereal year does not stay in step with the seasons.
The Columbia Electronic Encyclopedia™ Copyright © 2022, Columbia University Press. Licensed from Columbia University Press. All rights reserved.

sidereal year

The time taken by the Earth to complete one revolution around the Sun with reference to a background star or stellar group, which is regarded as fixed in position. It is thus the interval between two successive passages of the Sun, in its apparent annual motion around the celestial sphere, through a particular point relative to the stars. It is equal to 365.256 36 days and is about 20 minutes longer than the tropical year.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006

Sidereal Year

(religion, spiritualism, and occult)

A sidereal year is the time it takes Earth to complete an orbit of the Sun relative to the fixed stars. The length of a sidereal year is 365 days 6 hours 9 minutes and 9.54 seconds, which is slightly longer than a solar year.

The Astrology Book, Second Edition © 2003 Visible Ink Press®. All rights reserved.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Sidereal Year

 

the period of time between two successive arrivals of the sun, in its apparent annual motion, at the same point (with respect to the stars) on the celestial sphere. The sidereal year is equal to the earth’s period of revolution around the sun, with respect to the stars. The duration of a sidereal year is 365.25636 mean solar days.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

sidereal year

[sī′dir·ē·əl ′yir]
(astronomy)
The time period relative to the stars of one revolution of the earth around the sun; it is about 365.2564 mean solar days.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

sidereal year

sidereal yearclick for a larger image
Measurement of the sidereal year.
sidereal year
Left wing down. Nose remains on heading. Flight path to the left of the heading.
sidereal year
The ball of the slip indicator is inside the turn indicating that it is an unbalanced turn.
sidereal year
The period of one complete revolution of the earth around the sun with respect to a fixed point, 365 days 6 h 9 min and 9.5534 s in the year 1900, and increasing at a rate of 0.0001 s annually. Because of the precession of the equinoxes, this is about 20 min longer than a tropical year.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved


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