Which statement is true about the motion of planets in the solar system?

Question

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

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