Answer:
Perfect circles
Step-by-step explanation:
Heliocentric model of the solar system was proposed by Nicolaus Copernicus. According to this theory, Sun is at the center of the Solar system and the earth along with other planets and moons revolved about in concentric circles. Later, Kepler gave the laws of planetary motion according to which the planets revolve about the sun in elliptical orbits.
Thus, the correct answer is: Objects in space make perfect circles as they move according to the heliocentric model