Universe: Stars And Galaxies
6th Edition
ISBN: 9781319115098
Author: Roger Freedman, Robert Geller, William J. Kaufmann
Publisher: W. H. Freeman
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Chapter 8, Problem 51Q
To determine
(a)
To explain the characteristic of the solar system that all planetary orbits lie in nearly the same plane.
To determine
(b)
To explain that all planetary orbits in the solar system are nearly circular.
To determine
(c)
To explain that the planets orbit the Sun in the same direction in which the Sun itself rotates in the solar system.
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If you could visit another planetary system while the planets are forming, would you expect to see the condensation sequence at work, or do you think that process was most likely unique to our Solar System? How do the properties of the extrasolar planets discovered so far affect your answer?
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If the solar nebula hypothesis is correct, do you think there are more planets in the Universe than stars? Why or why not?
We think the terrestrial planets formed around solid “seeds” that later grew over time through the accretion of rocks and metals.
a) Suppose the Earth grew to its present size in 1 million years through the accretion of particles averaging 100 grams each. On average, how many particles did the Earth capture per second, given that the mass of the Earth is = 5.972 × 10 ^24 kg ?
b) If you stood on Earth during its formation and watched a region covering 100 m^2, how many impacts would you expect to see in one hour. Use the impact rate you calculated in part a. You’ll need the following as well: the radius of the Earth is = 6.371 × 10 ^6 m and the surface area of the Earth is 4??^2Earth
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Chapter 8 Solutions
Universe: Stars And Galaxies
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