Classical Dynamics of Particles and Systems
Classical Dynamics of Particles and Systems
5th Edition
ISBN: 9780534408961
Author: Stephen T. Thornton, Jerry B. Marion
Publisher: Cengage Learning
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Chapter 8, Problem 8.47P

Two double stars, one having mass 1.0 Msun and the other 3.0 Msun, rotate about their common center of mass. Their separation is 6 light years. What is their period of revolution?

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Astronomical observations of our Milky Way galaxy indicate that it has a mass of about 8 ✕ 1011 solar masses. A star orbiting near the galaxy's periphery is 6.0 ✕ 104 light years from its center. What should the orbital period (in y) of that star be?
A star in the Andromeda galaxy is found to have a planet orbiting it at an average radius of 3.38x10^10 m and an orbital period of 5.46x10^4 s. a.) what is the star's mass b.) a second planet is found orbiting the same star with an orbital period of 6.19x10^6 s. What is its orbital radius?
Our Sun is 2.3 * 104 ly (light-years) from the center of our Milky Way galaxy and is moving in a circle around that center at a speed of 250 km/s. (a) How long does it take the Sun to make one revolution about the galactic center? (b) How many revolutions has the Sun completed since it was formed about 4.5 *109 years ago?

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Classical Dynamics of Particles and Systems

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