Question

Multiple Select

Which of the following discoveries are attributed to Johannes Kepler? Select all that apply.
The orbits of the planets are ellipses.
The earth is round.
Gravitational forces govern planetary motion.
All planets move in elliptical orbits with the sun at one focus.
A line connecting a planet to the sun sweeps out equal areas in equal time periods.

Answer 1

The orbits of the planets are ellipses

A line connecting a planer to the sun sweeps out equal areas in equal time periods