What is another word for sidereal hour?
Pronunciation: [sa͡ɪdˈi͡əɹɪə͡l ˈa͡ʊ͡ə] (IPA) 
A sidereal hour is a unit of measurement used in astronomy to indicate the time it takes for a fixed point on the celestial sphere to complete a full rotation around the Earth. While there are no direct synonyms for the term sidereal hour, there are a few related terms that are sometimes used interchangeably. These include "sidereal day," which refers to the period of time it takes for the Earth to make one full rotation on its axis relative to the stars, and "sidereal time," which is a measurement of the hour angle of a fixed star based on the rotation of the Earth. Other related terms include "stellar hour" and "astronomical hour".
