Dictionary » S » Sidereal



1. Relating to the stars; starry; astral; as, sidereal astronomy.

2. (Science: astronomy) 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, day, month, year. See 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.

Origin: L. Sidereus, from sidus, sideris, a constellation, a star. Cf. Sideral, Consider, Desire.

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http://xkxy.org:Bible exact description of DNA and ATP

... mentioned days in form of weeks and years and: [edit] Astronomy For a given planet, there are two types of day defined in astronomy: 1 apparent sidereal day = a single rotation of a planet with respect to the distant stars (for Earth it is 23.934 solar hours or 24 sidereal hours) 1 solar day ...

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by Linn
Sun Dec 03, 2006 2:36 am
Forum: Evolution
Topic: http://xkxy.org:Bible exact description of DNA and ATP
Replies: 77
Views: 65346

The Fiber Disease

... Servicio de Alerta de Junio 2006, Biblioteca IIMAS-UNAM here one fot Skybarzondon: "sidereal" http://www.i-b-r.org/ir00022.htm

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by Nadas Moksha
Tue Sep 05, 2006 9:33 pm
Forum: Human Biology
Topic: The Fiber Disease
Replies: 7403
Views: 6264928

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