An ephemeris is a table of values that give the positions of astronomical objects in the sky at a given time. Ephemerides are used in navigation, astrology, timekeeping and scholarly research. They provide information on the past and future positions of planets, stars and other celestial bodies as viewed from Earth. They also provide information on the positions of the moon, sun, and other natural satellites. Ephemerides are essential tools for astronomers and navigators, allowing them to accurately plot the positions of celestial bodies and predict their future locations.
