Learn more by clicking the Google or Facebook button below. Population Demographics for Tonasket, Washington in 2016 and 2017. Other Counties and Cities in Washington.
Sidereal Period versus Synodic Period. 1  Measuring the motion of the Moon around the Earth relative to the distant stars leads us to what is called the sidereal period. 2  Measuring the motion of the Moon around the Earth relative to the Sun leads us to what is called the synodic (pronounced si-nod-ik) period.
sidereal period. 1  the time required for a celestial body within the solar system to complete one revolution with respect to the fixed starsâ i.e., as observed from some fixed point outside the system. The sidereal period of a planet can be calculated if its synodic period (the time for it to return to the...