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Name _______________________________ Period _______ Astronomy Unit Study Guide 1. _____ geocentric 2. _____ Kepler 3. _____ heliocentric 4. _____ constellation 5. _____ the Sun 6. _____ Hubble 7. _____ hydrogen 8. _____ spectra 9. _____ Copernicus 10._____ nebula A. the most abundant element (atom) in the universe B. the “star” in the middle of our solar system C. he formed three law’s of planetary motion D. a cloud of dust and gas in space E. the idea that the sun is the center of the solar system F. he developed a model of a sun-centered solar system G. a pattern of stars in the sky H. color that is emitted by a certain wavelength of light I. the idea that the earth is the center of the universe J. he developed a law that other galaxies are moving away from us 11. Place the following cosmic objects in order from smallest to largest: galaxy, star, planet, constellation, moon, universe, asteroid, solar system 12. In what part of the Milky Way Galaxy is our solar system located? 13. Make a simple sketch of the electromagnetic spectrum & label the following parts: radio waves, gamma rays, visible light (ROYGBV), high energy, low energy, long waves, short waves 14. Define: Hubble’s Law Red shift Blue shift Big Bang Theory - (not the TV show) 15. Briefly describe the steps of how our solar system formed according to the nebular hypothesis. (Use the following terms in your description: gravity, accretion, nebula.) 16. What is the reason for Earth’s seasons? How long does it take the Earth to orbit the sun once? 17. Define: Equinox Solstice - 18. List & explain Kepler’s 3 Laws of Planetary Motion. 1. 2. 3. 19. Define: Ellipse Barycenter Precession Nutation Revolution Rotation - 20. The earth’s shape is NOT a perfect sphere. It is flat near the poles and wider at the equator. Explain why it formed this way. 21. The word “nuclear” means having to do with the nucleus of an atom. Use the word bank to complete the chart: type how it works where it takes place how much energy released Nuclear Fusion Nuclear Fission Word Bank: tons of energy coming together one atom splitting star nuclear reactor on earth two atoms tons of energy in the middle of a (Honors only) 23. An astronomical unit (AU) is the distance from the sun to the earth. One AU equals 149,000,000,000 meters. Write this number using scientific notation.