Well, let me tell you, back in the good old days of ancient models of the solar system, they thought Earth was the center of the universe! Talk about an ego trip, am I right? But nowadays, we know better. We've upgraded to the modern model, where we've got circular orbits, a year that lasts approximately 365 days, and stars realizing they should stay in their own galactic neighborhoods and not interfere with our fabulous solar system. So, farewell to Earth's misplaced arrogance, and hello to the humbler and much more accurate modern model!
The feature of the modern model of the solar system that was not found in ancient models is "stars are not a part of our solar system". In ancient models, such as the geocentric model proposed by Ptolemy, it was believed that the Earth was at the center of the universe and that the stars were part of the solar system. However, in the modern model, it is understood that stars are separate celestial bodies located far outside of our solar system. Other features that differentiate the modern model from ancient models include the recognition of circular orbits and a year with approximately 365 days. The heliocentric model, proposed by Nicolaus Copernicus and refined by Johannes Kepler, eventually replaced the geocentric model and provided a more accurate understanding of our solar system.
The correct answer is "circular orbits." In the ancient models of the solar system, such as the geocentric model, it was believed that the Earth was at the center and celestial bodies, including the Sun, planets, and stars, revolved around it in perfect circles. However, in the modern model of the solar system, known as the heliocentric model, the Sun is at the center, and the planets, including Earth, orbit it in elliptical paths. This discovery of elliptical orbits was made by the astronomer Johannes Kepler in the 17th century, based on the observations of his predecessor, Tycho Brahe. Kepler's laws of planetary motion revolutionized our understanding of the solar system and provided a more accurate representation of celestial mechanics.
