# Planetary Motion

- Author:
- user1430

- Topic:
- Ellipse

Motion of planet in an ellipse around the sun.

The planet moves in an ellipse, with the sun at one focus.
The area swept remains constant.
Investigate moving the second focus (B) and the point of perihelion to discover the how the planet moves.
Look at the code to see how Kepler's equation is solved numerically.