How did the Ptolemaic model differ from other proposed solar system models? It said that the planets have epicycles. It said that the planets rotate on their axes. It said that the planets revolve around the Sun. It said that the planets and the Sun revolve around Earth.
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It is a well known fact that the planets of the Solar System vary considerably in terms of size. For instance, the planets of the inner Solar System are smaller and denser than the gas/ice giants of the outer Solar System. And in some cases, planets can actually be smaller than the largest moons. But a planet’s size is not necessarily proportional to its mass. In the end, how massive a planet is has more to do with its composition and density.
So while a planet like Mercury may be smaller in size than Jupiter’s moon Ganymede or Saturn’s moon Titan, it is more than twice as massive than they are. And while Jupiter is 318 times as massive as Earth, its composition and density mean that it is only 11.21 times Earth’s size. Let’s go over the planet’s one by one and see just how massive they are, shall we?
So while a planet like Mercury may be smaller in size than Jupiter’s moon Ganymede or Saturn’s moon Titan, it is more than twice as massive than they are. And while Jupiter is 318 times as massive as Earth, its composition and density mean that it is only 11.21 times Earth’s size. Let’s go over the planet’s one by one and see just how massive they are, shall we?
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The correct answer for your question is option (D)-The Ptolemaic Model said that the planet and the Sun revolves around Earth.
The Ptolemaic model was established back in the period of Aristotle. Developed by Claudius Ptolemaic, an Hellenistic astronomer of ancient Greece. However the model didn’t become standard.
The astronomers in ancient Europe and Islamic countries believed that this model as the correct cosmological model for over a millennium.
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