21st Century Astronomy
6th Edition
ISBN: 9780393428063
Author: Kay
Publisher: NORTON
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Chapter 11.4, Problem 11.4CYU
To determine
The best observation of the faint rings around the giant planet can be made in which condition.
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According to the chart below, how do the gas giants differ from the terrestrial planets?
THE TERRESTRIAL PLANETS
THE GAS GIANTS
MERCURY
MARS
JUPITER
SATURN
URANUS
NEPTUNE
VENUS
EARTH
ROCK
ROCK
ROCK
ROCK
INNER
CORE
INNER
CORE
CORE
SIren/
Nickel
CORE
Iron/
WATER
WATER
WATER
Nickel
OUTER
CORE
OUTER
CORE
METALLIC
U HYDROGEN
METALLIC
WATER
MANTLE
Reck
HYDROGEN
MANTLE
Rock
MANTLE
Reck
CORE
SIren/
Silicates
Silicates
Silicates
Nickel
HYDROGEN
GAS
HYDROGEN
GAS
HYDROGEN
HYDROGEN
GAS
GAS
SURFACE
SURFACE
SURFACE
SURFACE
O The gas giants do not have solid surfaces.
O The gas giants have an iron core.
O The gas giants lack hydrogen gas.
O The gas giants do not contain water.
Consider the attached light curve for a transiting planet observed by the Kepler mission. If the host star is identical to the sun, what is the radius of
this planet? Give your answer in terms of the radius of Jupiter.
Brightness of Star
Residual Flux
0.99
0.98
0.97
0.006
0.002
0.000
-8-881
-0.06
-0.04
-0.02
0.00
Time (days) →
0.02
0.04
0.06
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
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
Ch. 11 - Prob. 6QPCh. 11 - Prob. 7QPCh. 11 - Prob. 8QPCh. 11 - Prob. 9QPCh. 11 - Prob. 10QPCh. 11 - Prob. 11QPCh. 11 - Prob. 12QPCh. 11 - Prob. 13QPCh. 11 - Prob. 14QPCh. 11 - Prob. 15QPCh. 11 - Prob. 16QPCh. 11 - Prob. 17QPCh. 11 - Prob. 18QPCh. 11 - Prob. 19QPCh. 11 - Prob. 20QPCh. 11 - Prob. 21QPCh. 11 - Prob. 22QPCh. 11 - Prob. 23QPCh. 11 - Prob. 24QPCh. 11 - Prob. 25QPCh. 11 - Prob. 26QPCh. 11 - Prob. 27QPCh. 11 - Prob. 28QPCh. 11 - Prob. 29QPCh. 11 - Prob. 31QPCh. 11 - Prob. 32QPCh. 11 - Prob. 33QPCh. 11 - Prob. 34QPCh. 11 - Prob. 35QPCh. 11 - Prob. 36QPCh. 11 - Prob. 37QPCh. 11 - Prob. 38QPCh. 11 - Prob. 40QPCh. 11 - Prob. 41QPCh. 11 - Prob. 42QPCh. 11 - Prob. 43QPCh. 11 - Prob. 44QPCh. 11 - Prob. 45QP
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- 20 Approximately how many other planetary systems have been discovered to date? A Tens of thousands B) Tens C Hundreds D Thousands E Millionsarrow_forwardWhy do astronomers conclude that none of the Jovian planets' rings can be left over from the formation of the planets?arrow_forwardWhich one of the mechanism below can NOT be responsible for providing intrinsic luminosity for planets? Gravitational settling of the hydrogen molecules. Gravitational settling of the helium atoms. Residual heat dating from the formation epoch of the planets. Decay of radio-active isotopes like uranium.arrow_forward
- 4) Science fiction movies often portray asteroid belts as crowded, dense regions that require spaceships to maneuver quickly to get through them. In this problem, we will calculate the fraction of volume in an asteroid belt that is actually occupied by asteroids. a) If there are 300,000 large asteroids between 2 and 3 AU from the Sun, and each asteroid is assumed to be spherical with a radius of 100 km, determine the total volume occupied by asteroids in this region. Recall that the volume of a sphere is given by the equation V = 4TR³ /3. b) Let's assume the region in which these asteroids orbit is an annulus with an inner radius of 2 AU, an outer radius of 3 AU, and a thickness of 2Ro. Determine the volume of this region. Recall that the area of a circle is given by the equation A = TR². Here are two conversions that you'll need: 1 AU = 1.496 × 108 km and 1 Ro = 6.955 × 105 km. c) What is the ratio of the volume occupied by asteroids to the volume of the asteroid belt (i.e., the…arrow_forwardYou are making a scale model to visualize the relative sizes of the planets in our solar system. The scale of the model is: 1 cm = 2000 km. The radius of Saturn is 60,000 km. At what radius will Saturn appear on your scale model?arrow_forwardThe synchrotron radiation (radio waves) that astronomers first observed from Jupiter in the 1950's comes from a. deep within Jupiter, in the metallic hydrogen layers b. high speed electrons spirling around the planet's strong magnetic field c. the upper-atmosphere clouds that more quickly near the equator of the planet d. the Red Spot with its tremendous frictionarrow_forward
- Which of the following statements is correct? a. The formation of planets stopped because the solar nebula got cooler c. The formation of planets stopped because the solar nebula ran out of planetesimals d. The formation of planets stopped because the solar nebula spinning was slowing down e. The formation of planets stopped because the young Sun's strong solar wind swept away material not yet accreted onto the planetsarrow_forwardWhat 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_forwardWhy do you think the outer planets have such extensive systems of rings and moons, while the inner planets do not?arrow_forward
- Do all planetary systems look the same as our own?arrow_forwardMake a similar estimate for the mass of the Kuiper belt. The three largest objects are Pluto, Eris, and Makemake (each roughly 2000 km). In addition, assume there are eight objects (including Haumea, Orcus, Quaoar, Ixion, Varuna, and Charon, and objects that have not been named yet) with diameters of about 1000 km. Assume that all objects have Pluto’s density of 2 g/cm3. Calculate twice the mass of the largest 13 objects and compare it to the mass of the main asteroid belt.arrow_forwardWhat produced the helium now present in the Sun’s atmosphere? In Jupiter’s atmosphere? In the Sun’s core?arrow_forward
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