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Astronomy Galaxies Test Name: Directions: Answer the following questions with the most correct answers. TRUE/FALSE: 1. _____ Hubble classified galaxies 2. _____ There are three main classifications of galaxies 3. _____ Elliptical galaxies have little or no star formation 4. _____ Elliptical galaxies have little or no rotation 5. _____ Galactic cannibalism occurs in irregular galaxies 6. _____ S0 galaxies were once called lenticular galaxies 7. _____ The Milky Way is a barred spiral galaxy 8. _____ Our sun is in the Orion arm of the Milky Way 9. _____ The Andromeda galaxy is an irregular galaxy 10. _____ Our planet is closer to the edge of the Andromeda galaxy DIAGRAM: 1. Diagram and label the fork classification system of galaxies 2. Diagram and label a spiral galaxy. 3. Diagram and label the milky-way galaxy. SHORT ANSWERS: 1. Explain the lettering and numbering system used to classify galaxies. 2. How did we find the approximate age of the universe knowing the distance of the galaxy and its red-shift? 3. List and explain the main characteristics of each galaxy type.