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.

From Project Gutenberg

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

From Project Gutenberg

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

From Project Gutenberg