1. Planetary motion ID: ivo://edu.gavo.org/eurovo/ice_planetary_motion Title: Planetary motion Date: 27 Dec 2024 08:31:00 Publisher: The GAVO DC team Description: Within this use case you learn about Kepler's laws, a cornerstone of astronomy and a fundamental brick of both Newton's and Einstein's theories of gravitation. This use case is complemented by use cases 10 and 16 (at different levels of difficulty.