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Eng Book- Our Solar System- Download Free PDF


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Our solar system’s central star, the Sun, has inspired mythological stories in cultures around the world, including those of the
ancient Egyptians, the Aztecs of México, Native American tribes
of North America and Canada, the Chinese, and many others.
A number of ancient cultures built stone structures or modified
natural rock formations to mark the motions of the Sun and
Moon — they charted the seasons, created calendars, and monitored solar and lunar eclipses. These architectural sites show
evidence of deliberate alignments to astronomical phenomena:
sunrises, moonrises, moonsets, even stars or planets. Many cultures believed that the Earth was immovable and the Sun, other
planets, and stars revolved about it. Ancient Greek astronomers
and philosophers knew this “geocentric” concept from as early
as the 6th century B.C.
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