This HTML5 document contains 17 embedded RDF statements represented using HTML+Microdata notation.

The embedded RDF content will be recognized by any processor of HTML5 Microdata.

Namespace Prefixes

Prefix	IRI
n9	http://qudt.org/vocab/quantitykind/
dcterms	http://purl.org/dc/terms/
n6	http://qudt.org/vocab/sou/
n3	http://qudt.org/schema/qudt/
n2	http://qudt.org/vocab/unit/
rdfs	http://www.w3.org/2000/01/rdf-schema#
n4	http://qudt.org/vocab/dimensionvector/
n8	http://qudt.org/2.1/vocab/
rdf	http://www.w3.org/1999/02/22-rdf-syntax-ns#
xsdh	http://www.w3.org/2001/XMLSchema#

Statements

Subject Item

n2:DAY_Sidereal

rdf:type

n3:Unit

rdfs:label

Sidereal Day

rdfs:isDefinedBy

n8:unit

dcterms:description

The length of time which passes between a given fixed star in the sky crossing a given projected meridian (line of longitude). The sidereal day is \(23 h 56 m 4.1 s\), slightly shorter than the solar day because the Earth 's orbital motion about the Sun means the Earth has to rotate slightly more than one turn with respect to the "fixed" stars in order to reach the same Earth-Sun orientation. Another way of thinking about the difference is that it amounts to \(1/365.2425^{th}\) of a day per day, since even if the Earth did not spin on its axis at all, the Sun would appear to make one rotation around the Earth as the Earth completed a single orbit (which takes one year).

n3:hasDimensionVector

n4:A0E0L0I0M0H0T1D0

n3:informativeReference

http://en.wikipedia.org/wiki/Sidereal_time http://scienceworld.wolfram.com/astronomy/SiderealDay.html

n3:symbol

day{sidereal}

n3:hasQuantityKind

n9:Time

n3:applicableSystem

n6:CGS n6:CGS-EMU n6:CGS-GAUSS n6:IMPERIAL n6:SI n6:USCS

n3:conversionMultiplier

86164.099

n3:ucumCode

d