The accurate order for changing models of our solar system, starting with the oldest and ending with the most recent changes, is:
geocentric, heliocentric, elliptical orbits.
Explanation:
- Geocentric: This was the earliest model where the Earth was believed to be at the center of the universe.
- Heliocentric: The heliocentric model proposed by Copernicus placed the Sun at the center of the solar system, with the Earth and other planets orbiting around it.
- Elliptical Orbits: Later, Kepler refined the heliocentric model by showing that planets move in elliptical orbits rather than circular ones.
So, the correct response is "geocentric, heliocentric, elliptical orbits."