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.
This is called the solar day. But the actual period ofâ¦ rotation is less, about 23 hours and 56 minutes. This is in relation to the fixed stars and is called a sidereal day. A solar day is the time it takes for the Earth to rotate so that after one rotation the Sun is in exactly the same position relative to Earth.