👉 In astronomy, an equidiurnal star is a star that orbits in exactly one direction. This means that it will be always at its same position on the sky at the same time every day of the year. For example, the Sun is an equidiurnal star because it goes through each phase of the Moon twice each month. The term "equidiurnal" comes from the Greek word "equi" meaning "equal" and "diurna" meaning "day". So in this
