Well thought out and carefully crafted. With this interactive tool at their fingertips, it won't take long to master the concepts of classical orbital mechanics.
Orbits simulates the motion of planets, rockets, and stars in a highly visual forum.
This promotes an understanding of classical mechanics that can't be matched by manipulating algebraic or differential equations. The program will calculate and plot the motion of up to seven bodies. The other five bodies are light and do not influence the motion of other objects. You can vary velocity, change the value of the gravitational constant, or shift to a different frame of reference while maintaining existing orbits. This allows for straightforward investigation of retrograde motion and Lagrange point stability.