A) it is the pull of the Sun's gravity that holds the planets in their orbits.
B) the planets revolve about the Sun in elliptical orbits.
C) all planets travel at constant speeds as they orbit the Sun.
D) the ratio of the square of the period to the square of the semimajor axis is the same for all planets.The laws of planetary motion developed by Kepler indicate that?B) It is a portions of Kepler's First LawThe laws of planetary motion developed by Kepler indicate that?A) it is the pull of the Sun's gravity that holds the planets in their orbits
Edit: ALL of Kepler's laws imply that gravity is what holds the planets in their orbits. Without the Sun's gravity THERE WOULD BE NO ORBITS.
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