Orbital mechanics 1

4 articles
1 challenge
1 video
2 skills
1 talkthrough
How do planets move? An introduction to orbital mechanics and the work of Johannes Kepler.

Applying pi


Problem solving with area and circumference of circles

Practice interesting area and circumference problems.

Introduction to ellipses

VIDEO 14:14 minutes
Sal introduces ellipses and shows how their standard equation relates to their center and radii (ellipses have two radii: major and minor).

Find the center and radii of an ellipse from its equation

Find the center and major and minor radius of an ellipse given its equation.

INTERACT: Elliptical orbits

Click and drag either foci to change orbit. You can also mouseover the terms below for definitions.