SOLAR SYSTEM

Detailed explanation-1: -The Aristotelian explanation of gravity is that all bodies move toward their natural place. For the elements earth and water, that place is the center of the (geocentric) universe; the natural place of water is a concentric shell around the earth because earth is heavier; it sinks in water.

Detailed explanation-2: -According to Aristotle natural motion for celestial objects was different than for objects of the earth because they belonged in different places. For celestial objects like the moon, Aristotle said it was natural for them to move in circles because they were from the heavens and they wanted to stay in the heavens.

Detailed explanation-3: -Aristotle believed that the universe was spherical and finite. He also believed that the earth was a sphere, much smaller than the stars. To support his theory, he used observations from lunar eclipses stating that lunar eclipses would not show segments with a curved outline if the earth were not spherical.

Detailed explanation-4: -Aristotle (384-322 BC) was among the first to recognize the fact of our planet being a round sphere. He observed lunar eclipses and noticed that only a round sphere could imply a circular shadow. This astronomical observation was confirmed by general observations made at sea.

Detailed explanation-5: -Aristotle further believed that objects fall at a speed that is proportional to their weight. In other words, if you took a wooden object and a metal object of the same size and dropped them both, the heavier metal object would fall at a proportionally faster speed.