Universe
11th Edition
ISBN: 9781319039448
Author: Robert Geller, Roger Freedman, William J. Kaufmann
Publisher: W. H. Freeman
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Question
Chapter 14, Problem 25Q
To determine
The reasons as to why Neptune is supposed to be surrounded by a broad system of rings someday, just like Saturn.
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Some astronomers argue that Jupiter and Saturn areunusual, while other astronomers argue that all solarsystems should contain one or two such giant planets.
What is the observed angular speed of
Neptune, along the ecliptic of Earth, when it is
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Presume the orbits are circular. Earth has
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5.43km/s, Neptune here has orbital radius
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In Neptune's rings, each ring particle collides with another particle on average around every 8.7 hours. If a ring particle was to survive for the age of the solar system, which is 4.6 x109 years, how many collisions would it undergo? Assume there are 365.25 days in a year
Chapter 14 Solutions
Universe
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- Why do the upper levels of Neptune’s atmosphere appear blue?arrow_forwardWhy do you suppose the rings of Saturn are made of bright particles, whereas the particles in the rings of Uranus and Neptune are black?arrow_forwardWhy might the surface brightness of ring particles and small moons orbiting Uranus and Neptune depend on whether those planets have extensive, strong magnetic fields?arrow_forward
- Saturn is about 60,000 km in radius, and its rings are only about 0.01 km thick with ripples 100 m high. Design a really big model with Saturn 60 inches in radius (10 ft in diameter). How thick must the rings be in your model and how high can the ripples be? A sheet of paper is about 0.004 inches thick.arrow_forwardHow was the discovery of Neptune not accidental?arrow_forwardWhat is the consequence of Uranus’ spin axis being 98° away from perpendicular to its orbital plane?arrow_forward
- If Neptune's clouds have a temperature of 60 K, at what wavelength will they radiate the most energy? (Wein's Law)arrow_forwardI would like you to compare the thickness of Saturn's rings to objects here on Earth if those rings were scaled down to the size of the objects here on Earth (hint: this means it is a ratio problem). Imagine the rings of Saturn like a DVD or CD here on Earth. The DVD has a diameter of approximately 12 cm, whereas the rings of Saturn have a diameter of approximately 280,000 km. The thickness of a DVD is about 0.6 mm and the thickness of the rings of Saturn at their thickest is approximately 1 km. If we were to scale the diameter of rings of Saturn down to the diameter of a DVD, how does the new thickness of the rings of Saturn compare to the thickness of the DVD? Please provide both the new thickness of Saturn's rings and how many times thicker or thinner they would be than a CD in your answer.arrow_forwardNeptune probably does not have a rocky core. (T/F)arrow_forward
- GM What is the orbital velocity and period of a ring particle at the outer edge of Saturn's A ring? (Note: The radius of the edge of the A ring is 136,500 km. Hint: Use the formula for orbital velocity, V. = v orbital velocity km/s period hrarrow_forwardHow does the dynamo effect take place in Neptune?arrow_forwardUranus is about 26,000 km in radius, and its main ring is about 51,000 km from the planets center. If you represent the planet with a ball 5 inches in radius, how far from the center would you place its main ring?arrow_forward
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