👉 The Galilean system, also known as the Galileo Galilei system or the Galilean rotation, is a coordinate system used in astronomy and physics to describe the motion of celestial bodies. It was developed by Galileo Galilei in 1609. In this system, the Earth's orbit around the Sun is described using two perpendicular axes, known as the "Galilean Axes," which are parallel to the orbital plane of the Earth. The Earth's axis of