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- Why do astronomers think the asteroids were never pt of a full- sized planet?6. N. TEBOOK 1. Draw and label a picture of the asteroid belt that shows how far the asteroid belt is from the sun in AUs. Include the sun and Earth in your picture.1. Suppose you have an Oort cloud comet on an orbit with pericenter distance 10,000 AU, and apocenter distance 20,000 AU. a. What are the semi-major axis and eccentricity of the orbit? b. What are the specific energy (energy per unit mass), and specific angular momentum (angular momentum per unit mass) of the comet? c. How fast is the comet moving at apocenter (relative to the Sun)?
- 12. Why is Jupiter so much riches in hydrogen and hellum than Earth?18. From where do comets originate?A. Just outside the orbit of JupiterB. A belt between Jupiter and MarsC. between the orbits of Saturn and UranusD. From the surrounding outer regions of the solar systemHow many impacts would you expect to strike a 100m2 region in one hour during Earth’s formation, assuming that Earth grew to its present size in 10 million years from particles averaging 100 grams each? (Hint: Assume that Earth had its current radius of 6378km.) (Notes: The surface area of a sphere is 4pir2 ; 1yr=3.2x107 .) a. About 1300. b. About 13 . c. About 13,000. d. About 130
- How can Jupiter have a liquid interior and not have a definite liquid surface?What does the term differentiated mean when applied to a planet? Would you expect to find that planets are usually differentiated? Why?What is the maximum angular diameter of the largest asteroid, Ceres, as seen from Earth? Can Earth-based telescopes detect surf ace features? Can the Hobble Space Telescope’ (Hint: Use the small-angle formula in Reasoning with Numbers 3-1.) (Notes: The angular resolution of Earth-based telescopes is about 1 arc second and of HST about 0.1 arc second. Ceres’ average distance from the Sun is 2.8 AU.)