ELI5: Explain Like I'm 5

Jet Propulsion Laboratory Development Ephemeris

Jet Propulsion Laboratory Development Ephemeris (JPL DE) is a mathematics system developed by NASA's Jet Propulsion Laboratory (JPL) to predict the locations of planets, moons, and other objects in our solar system over long periods of time. It uses a set of mathematical calculations and equations to accurately track the position of the planets and other bodies in our solar system. This is useful for scientists who are trying to explore and understand our solar system. By studying where the planets and other bodies are, scientists can learn about their behaviors and how the solar system works. The system is also used by astronauts to plan trips to space.