ephemerides
Ephemerides are tables or data sets that provide the positions of celestial objects, such as planets, moons, and stars, at specific times. They are essential for astronomers and navigators, helping them predict where these objects will be in the sky at any given moment.
These calculations are based on the laws of physics and astronomy, taking into account factors like gravitational influences and orbital mechanics. Ephemerides can be used for various applications, including satellite tracking, astrophotography, and even space missions, ensuring accurate navigation and observation of celestial phenomena.