I wrote a lot of posts on ellipses and related topics over the last couple months. Here’s a recap of the posts, organized into categories.
Basic geometry
- Eccentricity, flattening, and aspect ratio
- Latus rectum
- Directrix
- Example of a highly elliptical orbit
More advanced geometry
- Pascal’s theorem
- Intersection of two conics
- Determining conic sections by points or tangents
- Evolute of an ellipse