sidereal hour

noun

1. a 24th part of a sidereal day

Example Sentences

The latter are divided into sidereal hours, minutes and seconds as the solar day is.

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The sun apparently moves at the rate of 15� in a solar hour; the stars at the rate of 15� in a sidereal hour.

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For example, if the right ascension of a star is exactly 15�, it will pass the meridian one sidereal hour after the vernal equinox.

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