AST101H1 Chapter Notes - Chapter 1: Ecliptic, Industrial Revolution, Copernican Revolution

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AST101H1 Full Course Notes
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AST101H1 Full Course Notes
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Chapter 1 our place in the universe. The sun, moon, planets and stars appear to circle around our sky each day, and we cannot feel the constant motion of earth as it rotates on its axis and orbits the sun. It therefore seems quite natural to assume that we live in an. Earth is a planet in our solar system, which consists of the sun and all the objects that orbit it: the planets and their moons, and countless smaller objects including rocky asteroids and icy comets. The sun and all the stars we can see with the naked eye make up only a small part of a huge, disk-shaped collection of stars called the milky way galaxy. A galaxy is a great island of stars in space, containing from a few hundred million to a trillion or more stars. The milky way galaxy contains over 100 billion stars.

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