- #1
stonecoldgen
- 109
- 0
I know that kepler looked at Tacho Bradhe's work and knew the equations related to ellipses
but the question is as simple as:
how did kepler knew the sun was at one of the foci of the ellipse?
but the question is as simple as:
how did kepler knew the sun was at one of the foci of the ellipse?