Chapter 5 Review Question Answers 1. Which of the following times is closest to the age of the universe when our solar system formed? a. 0 years ( they formed together), b. a million years, c. 10 million years, d. a billion years, e. 10 billion years he universe is about 13.8 billion years old and the solar system is about 4.5 billion years old, so the universe was about 10 billion years old when our solar system formed. 2. Pluto is most similar in composition to which of the following objects? a. Eris b. Jupiter c. our Moon d. Earth e. the Sun (a) Pluto is most like Eris, another Trans-Neptunian Object. 3. Interactive exercise. 4. Describe four methods for discovering extrasolar planets. Extrasolar planets can be discovered by observing them directly, called direct imaging, by observing the Doppler shift of the star due to the pull of the orbiting planet, and by observing the periodic variation of the starlight due to the planet passing between that star and Earth, an event called a transit. Advanced Questions
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This note was uploaded on 04/01/2011 for the course AST 1002 taught by Professor Wilsonkey during the Spring '11 term at St. Johns River Community College.