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Below are the previews for the slide in Topic 7 - Astronomy. If you click on them, you can see larger versions. If you are on a computer you can press the left and right arrows to move. You can also click the arrows to the left and right of the screen.

Powerpoint Description:

This slideshow covers: gravity, how gravitational field strength varies on different planets and the moon, our solar system, how our knowledge of the solar system has changed over time, asteroids, comets, orbits of the Earth, the moon and artificial satellites, how changing the altitude affects speed, the Big Bang Theory compared to the Steady State Theory, red shift and how it is evidence for both theories, cosmic microwave background radiation and how it is evidence for the Big Bang theory, the life cycle of a star, what happens to small and large stars in the future, observing the universe, advantages of using space telescopes.

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