21st Century Astronomy
6th Edition
ISBN: 9780393428063
Author: Kay
Publisher: NORTON
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Chapter 5, Problem 6QP
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Our Solar System consist of two distinctly different types of planets.
A. Describe how these planets differ in their general characteristics.
B. Explain the cause of these differences
Why are all large celestial bodies (stars, planets, larger moons) very nearly spherical in shape?
a
because of the centrifugal force from the body's rotation
b
because of tidal forces
c
because gravity tries to pull every part of the celestial body to the center
d
because of the pressure from the heat in the body's core
(1) A spherical planet has a radius of 2,000 km and a mass of 1025 kg. Calculate its density (mass/volume) in kilograms per cubic meter.
(2) How many of the atoms in Question (3) can fit within a spherical planet with a diameter of
2 X 104 km?
(3) An asteroid’s radius is 200 m and its distance from Earth is 107 km. What angle in degrees (θ) will it subtend? Use the equation θ = 57 (diameter) / distance
Chapter 5 Solutions
21st Century Astronomy
Ch. 5.1 - Prob. 5.1ACYUCh. 5.1 - Prob. 5.1BCYUCh. 5.2 - Prob. 5.2CYUCh. 5.3 - Prob. 5.3CYUCh. 5.4 - Prob. 5.4CYUCh. 5.5 - Prob. 5.5CYUCh. 5 - Prob. 1QPCh. 5 - Prob. 2QPCh. 5 - Prob. 3QPCh. 5 - Prob. 4QP
Ch. 5 - Prob. 5QPCh. 5 - Prob. 6QPCh. 5 - Prob. 7QPCh. 5 - Prob. 8QPCh. 5 - Prob. 9QPCh. 5 - Prob. 10QPCh. 5 - Prob. 11QPCh. 5 - Prob. 12QPCh. 5 - Prob. 13QPCh. 5 - Prob. 14QPCh. 5 - Prob. 15QPCh. 5 - Prob. 16QPCh. 5 - Prob. 17QPCh. 5 - Prob. 18QPCh. 5 - Prob. 19QPCh. 5 - Prob. 20QPCh. 5 - Prob. 21QPCh. 5 - Prob. 22QPCh. 5 - Prob. 23QPCh. 5 - Prob. 24QPCh. 5 - Prob. 25QPCh. 5 - Prob. 26QPCh. 5 - Prob. 27QPCh. 5 - Prob. 28QPCh. 5 - Prob. 29QPCh. 5 - Prob. 30QPCh. 5 - Prob. 31QPCh. 5 - Prob. 32QPCh. 5 - Prob. 33QPCh. 5 - Prob. 34QPCh. 5 - Prob. 35QPCh. 5 - Prob. 36QPCh. 5 - Prob. 37QPCh. 5 - Prob. 38QPCh. 5 - Prob. 39QPCh. 5 - Prob. 40QPCh. 5 - Prob. 41QPCh. 5 - Prob. 42QPCh. 5 - Prob. 43QPCh. 5 - Prob. 44QPCh. 5 - Prob. 45QP
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- 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)arrow_forwardWhy is Jupiter so much richer in hydrogen and helium than Earth?arrow_forwardWhat is the difference between the daily and annual motions of the Sun?arrow_forward
- Step-by-step, explain how energy flows from the center of the Sun to Earth.arrow_forwardWhat does the term differentiated mean when applied to a planet? Would you expect to find that planets are usually differentiated? Why?arrow_forwardImagine that you visit a planet orbiting another star and discover that it is heavily cratered, but its small moon is nearly crater free. Why would that be a surprise? Speculate about what might have happened to those objects.arrow_forward
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