Adjective
Relating to the stars; starry; astral; as, sidereal astronomy.
Measuring by the apparent motion of the stars; designated, marked out, or accompanied, by a return to the same position in respect to the stars; as, the sidereal revolution of a planet; a sidereal day.
Source: Webster's dictionarysidereal time Source: Internet
sidereal bodies Source: Internet
the sidereal system Source: Internet
An anomalistic month is longer than a sidereal month because the perigee moves in the same direction as the Moon is orbiting the Earth, one revolution in nine years. Source: Internet
Astronomy and Astrophysics 105(2), 361, 1982, see equation 19. defined UT1 such that the observed sidereal day at the beginning of 2000 would be times a UT1 day of main s, which gives main s of UT1. Source: Internet
Both solar time and sidereal time make use of the regularity of Earth's rotation about its polar axis, solar time following the sun while sidereal time roughly follows the stars. Source: Internet