Final answer:
In the heliocentric model, the Moon is the only object that orbits Earth. This model, proposed by Copernicus and supported by astronomers like Galileo, correctly depicts the solar system with planets orbiting the Sun.
Step-by-step explanation:
In the heliocentric model, the only object that orbits Earth is the Moon. This model, developed by Nicolaus Copernicus and further supported by observational evidence from astronomers such as Galileo Galilei, places the Sun at the center of the solar system. All the planets, including Earth, orbit the Sun. In contrast, the earlier Ptolemaic or geocentric model had the Earth at the center with the Moon, planets, Sun, and stars revolving around it. However, modern understanding and the heliocentric model correctly depict the solar system with the Sun at the center, characterized by planets orbiting the Sun, and only the Moon orbiting Earth.