Civilization in the West

Ptolemy had a unique perspective on the universe; according to his observations, celestial phenomena such as the Moon, Sun, planets, stars, and the Earth were constant, i.e. they were not in motion (Spielvogel, 2014). In other words, he didn't believe the planets rotated. The Ptolemaic ideas were later refuted by...

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Although most people think of the sun as a flawless, round, and smooth ball of fire with no flaws, a closer examination shows that it has some dark spots known as sunspots. These sunspots usually occur in pairs or groups, and they emerge from the sun's interiors. They are noteworthy...

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Pages: 7

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