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Astronomy Review Unit 2 Test Review How are red shifts used to support (prove) the Big Bang Theory? Red Shifts are used to show that objects are moving away from the center of the Universe, thus proving that objects in space are still moving outward since the Big Bang occurred. What is the approximate age of our Universe? 14.7 billion years old Place the following objects in order from largest to smallest: Asteroid, Galaxy ,Planet ,Star (Largest) Galaxy, Star, Planet, Asteroid (Smallest) List 2 characteristics that are used to determine whether a planet is a Terrestrial planet or a Jovian planet? a. Jovian planets are large; terrestrial planets are small b. Jovian planets are made of gas; terrestrial planets are made of rock and metals c. Jovian planets have no solid surface; terrestrial planets have a solid surface This Earth motion occurs every 26,000 years. precession This Earth motion is responsible for the days. rotation (rotate) This Earth motion is responsible for the seasons. tilt What nuclear process produces radiant energy of stars? Nuclear Fusion Identify the summer season in the Northern Hemisphere. B A B C D