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The Copernican Revolution

Across
units of distance used in astronomy, equal to about 3.26 light years
1/3600 of a degree
Sun - Centered
Model depicting Earth as center of the Solar System
an imaginary line or standard by which things are measured or compared
Down
the mean distance from the center of the earth to the center of the sun
Astronomer who formulated a model of the universe that placed the Sun rather than Earth at its center.
a drastic and far-reaching change in ways of thinking and behaving
the whole cosmic system of matter and energy of which Earth, and therefore the human race, is a part