21st Century Astronomy
6th Edition
ISBN: 9780393428063
Author: Kay
Publisher: NORTON
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Chapter 11, Problem 9QP
To determine
The lightning condition that are most suitable for observing the dust particles in the planetary rings.
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Surprisingly, the New Horizons probe took pictures of Pluto and found
a.
ongoing volcanic eruptions
b.
mountain ranges
c.
lakes of methane
d.
a lot of impact craters
Pluto and other "dwarf planets" are not considered proper planets because
a.
they don't have any moons
b.
they are members of belts like the asteroid and Kuiper belts
c.
they don't have atmospheres
d.
their orbital inclinations are too high
e.
their orbits are too eccentric
Which of these planets has never had an artificial satellite?
a.
Neptune
b.
Saturn
c.
Mars
d.
Jupiter
e.
Venus
Ovals, spots, and storms do not appear prominently in the atmosphere of Saturn because the
a.
temperature is too low.
b.
temperature is too high.
c.
atmospheric chemistry does not permit their development.
d.
atmosphere is too dense.
e.
planet’s ring system interferes with storms.
14. Saturn's rings
a. were created by its incredibly large gravitational capture of asteroids and comets
b. have looked basically the same since they formed along with Saturn
c. are continually supplied by impacts into small moons
d. were created long ago when tidal forces tore apart a large moon
Chapter 11 Solutions
21st Century Astronomy
Ch. 11.1 - Prob. 11.1CYUCh. 11.2 - Prob. 11.2ACYUCh. 11.2 - Prob. 11.2BCYUCh. 11.3 - Prob. 11.3CYUCh. 11.4 - Prob. 11.4CYUCh. 11 - Prob. 1QPCh. 11 - Prob. 2QPCh. 11 - Prob. 3QPCh. 11 - Prob. 4QPCh. 11 - Prob. 5QP
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- Imagine 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_forwardYou are a planetary scientist studying the atmosphere of Jupiter through a large telescope when you observe an asteroid approaching the planet. This asteroid is large, so you know it is held together by gravity rather than the cohesive forces that hold a large rock together. If the asteroid gets too close to Jupiter, the massive tidal forces will tear it apart, scattering small particles that will add to the ring system. You have calculated the closest distance the asteroid will come to Jupiter. How do you know if the asteroid will survive? a. A measure of the cohesive gravitational force holding such an asteroid together is the gravitational field on the surface due to the mass of the asteroid. This field is independent of the distance of the asteroid from Jupiter. Calculate the gravitational field at the surface of the asteroid due only to the mass of the asteroid. Assume the asteroid has a diameter of 10,000 km and a density of 1300 kg/m3. b. Tidal forces from Jupiter tend to disrupt the asteroid by pulling it apart. The tidal forces depend on the distance between Jupiter and the asteroid. There is a distance between Jupiter and the asteroid known as the Roche limit where the tidal forces are balanced by the asteroids own cohesive gravitational force. If the asteroid is within the Roche limit, it will be torn apart. Figure P7.60 shows Jupiters gravitational field as a function of distance from its center. By looking at this graph, can you determine an approximate value for the Roche limit for this asteroid in the vicinity of this planet? c. What will happen to the Roche limit if we consider an asteroid of lower density? FIGURE P7.60arrow_forwardThe Cassini division is a large gap in the rings of Saturn. This gap is most likely produced by a. the reflection of sunlight off dark material. b. resonances between ring particles and the moon Mimas. c. shepherding satellites. d. the absorption of sunlight by dark material.arrow_forward
- Choose the best answer b. Terrestrial planets are further from the Sun, more dense and have fewer moons c. Terrestrial planets are closer to the sun, less dense and have fewer moons d. Terrestrial planets are closer to the Sun, more dense and have fewer moons e. Jovian planets are closer to the Sun, less dense and have more moons f. Jovian planets are further from the Sun, more dense and have more moonsarrow_forwardSaturn, as viewed through a telescope, appears as a a. spherical and heavily cratered object. b. bland and nearly featureless disk. c. disk composed of brightly colored belts and bands. d. highly elliptical and bright blue disk.arrow_forwardThe high-speed winds, high-level white clouds of methane ice crystals, and cyclonic circulations on Neptune are produced by the a. large amount of heat from the sun that is received at Neptune’s distance. b. small amount of heat from the sun and the flow of heat from the interior of the planet. c. strong magnetic field of the planet. d. flow of heat from the interior of the planet. e. unusually rapid rotation of the planet.arrow_forward
- What is the range of density for the outer planets (in g/cm3)? 1.2 to 5.5 2.2 to 5.5 2.2 to 6.5 3.3 to 7.2 none of thesearrow_forwardWhen tidal bulges are NOT in a direct Earth-moon line but slightly ahead of the moon, a. Earth’s gravity weakens. b. their gravitational field pulls the moon forward in its orbit, causing it to recede from Earth. c. their gravitational field pulls the moon back in its orbit, causing the moon to fall toward Earth. d. Earth’s gravity strengthens, causing the moon to orbit faster. e. the tidal bulges have no effect on the moon.arrow_forwardi legacynv.schoology.com/common-assessment-dlelivery/start/48958977 Kuiper Belt Jupiter Mercury Venus Urahus Saturn Mars Farth · Ceres Neptune Jupiter Pluto inner solar system outer solar system not to scale Is this model to scale regarding the sizes of the planets and distances between them? Why or why not? O Yes. That is why the outer planets are shown in a separate box. O No. The distances in the solar system are too great to produce a model accurate to distance that still has inner planets visible. O No. The outer planet distances are drawn to scale, but the inner planets need to be drawn farther from the sun to be visible. 1 4arrow_forward
- 1. Which of the outer planets have compositions dominated by the "ices" ingredient? Check the correct two. 2. Which of the outer planets have compositions dominated by the "gases" ingredient? Check the correct two. 3. Most of the spaceflight missions to the outer planets have been flyby missions, but two of them were orbiters. Which of these two spacecraft orbited giant planets? Check the correct two. (Hint: An orbiter might do a flyby of one planet and then go on to orbit a different planet.) 4. Jupiter's mass is how many times larger than the Earth's? Just type a number, no words or any other extra stuff. 5. Which of the outer planets has extreme seasons, with its rotational axis being tilted so much that it is practically in the plane of its orbit?arrow_forwardThe reason that most moons in our solar system orbit in all sorts of crazy directions is because most moons a. co-formed with their planets b. are the result of major collisions c. have been pulled into these crazy orbits by tidal forces d. are captured asteroids Tidal flexing will occur in a moon whose orbit is a. close to its planet and circular b. far from its planet and circular c. far from its planet and eccentric d. close to its planet and eccentricarrow_forwardThe surface of medium-sized moons provides us with information about the outer solar system. Which of these properties reveals that the outer regions of the solar system was once a very active location? a. the presence of dust Ob. the odd shape of the moons c. the presence of impact craters d. the presence of large cracks on the surface e. their icy surfaces Marrow_forward
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