sidereal time

Noun
  1. Measured by the diurnal motion of stars (synset 115232958)
    is a type of: cosmic time - the time covered by the physical formation and development of the universe
    subtypes:
    • day, sidereal day - the time for one complete rotation of the earth relative to a particular star, about 4 minutes shorter than a mean solar day
    • sidereal year - the time for the earth to make one complete revolution around the sun, relative to the fixed stars
    • sidereal hour - 1/24 of a sidereal day
    • sidereal month - period between successive conjunctions with a star, 27.322 days

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