Which statement is true about the motion of planets in the solar system? A. The sun is at one focus of each planet's elliptical orbit. B. The sun is at the exact center of each planet's elliptical orbit. C. The speed of a planet's elliptical orbit is proportional to its mass. D. The planets have circular orbits around the Sun.

Answer 1

The true statement about the motion of planets in the solar system is:

A. The sun is at one focus of each planet's elliptical orbit.

This is based on Kepler's First Law of Planetary Motion, which states that planets move in elliptical orbits with the Sun at one of the two foci of the ellipse.