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Earth Rotation Time

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Title Earth Rotation Time
Author(s) J. Sanz Subirana, J.M. Juan Zornoza and M. Hernández-Pajares, Technical University of Catalonia, Spain.
Level Basic
Year of Publication 2011

A time linked to the earth's rotation can be measured from the angle between a reference meridian (local or the Greenwich one) and the meridian containing a celestial reference: the Solar Time takes the Sun as a reference, whereas the Sidereal Time takes the Vernal Equinox (the Aries Point) as a reference.