21st Century Astronomy
21st Century Astronomy
6th Edition
ISBN: 9780393428063
Author: Kay
Publisher: NORTON
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Chapter 7.5, Problem 7.5CYU
To determine

Select the correct method for discovering an Earth-mass planet around a star.

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1) Contrast the difference between Comets and Asteroids – describe the orbit, composition, and how they appear in the sky. 2)Explain how the terrestrial planets and the Jovian planets ended up so different.
1. The diameter of the Sun is equal to 1.392*10^9 m, and the distance from the Sun to Saturnis equal to 9.5 AU. Suppose you want to build an exact scale model of the solar system,and you are using a volleyball with average diameter of 21 cm to represent the Sun. a) In your scale model, how far away would Saturn be from the Sun? Give your answer inmeters.b) The actual diameter of Saturn is 116,460 km. What would be Saturn’s diameter in yourscale model? Give your answer in centimeters.
Kepler 3rd law:    M1 + M2 = P2/D3   Jupiter’s moon Callisto orbits the planet at a distance of 1.88 X 106 km in about 16.7 days. If one year is 365 days, and if 1 AU is 1.5 X 108 km, calculate the mass of Jupiter in solar mass units. (Show your work)
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