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Name: Date of Test: Astronomy Study Guide Words/Phrases to know: gravitationally bound object (objects held together by gravity) ex Galaxy, solar system, galactic cluster 1. If the average distance between the Earth and the Sun were reduced by half, what changes would occur in the Sun’s gravitational pull on Earth and the Earth’s period of revolution? 2. What type of galaxy is the Milky Way? 3. What unit of distance do we use to measure the distance between stars and galaxies? 4. THE UNIVERSE IS ALWAYS EXPANDING. HOW CAN WE PROVE THAT? DEFINE: Galaxy: Red Shift: Blue Shift: Example: Astronomical object moving away from you will appear what color? (red or blue) Put the following categories in order from largest to smallest. (galaxy, galactic cluster, planet, solar system. Circle the correct answer: Which younger and smaller: (Earth’s solar system or the universe) The Universe is ____________ (older or younger) than our solar system. Name: THINGS TO STUDY _____ STUDY GUIDE _____ ASTRONOMY VOCABULARY _____ MASS VS. WEIGHT Date of Test:
