Kepler noticed that the distance to the sun varies for planets in their orbits, which led him to propose Kepler's first law of orbital motion. This law states that planets move in elliptical orbits with the sun at one of the foci.
Which did Kepler notice about planetary motion that caused him to propose Kepler's first law of orbital motion?
Responses
Most planets have highly elliptical orbits
Most planets have highly elliptical orbits - no response given
The distance to the sun varies
The distance to the sun varies - no response given
The distance between Mars and the sun is constant
The distance between Mars and the sun is constant - no response given
The planets have circular orbits
1 answer
3 answers