21st Century Astronomy
6th Edition
ISBN: 9780393428063
Author: Kay
Publisher: NORTON
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Chapter 7, Problem 37QP
To determine
Measure the density of Venus, Jupiter and Neptune. Compare with densities of rock, water and gas.
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The ratio of charon to pluto's roche limit? or
How close is Charon to Pluto's Roche limit?
please solve accurate and exact
Which of these things did the Voyager spacecraft discover about Enceladus in the early 1980s, indicating that it is somewhat unusual among planetary bodies in our solar system? Check the TWO items that apply.
a It has a thick atmosphere, made mostly of nitrogen.
b It has the darkest, least reflective surface of all the known planetary bodies.
c It is the brightest (i.e. most reflective) object in the solar system.
d The entire surface is more heavily-cratered than any other body in our solar system.
e Its surface is very smooth in some places.
Tutorial
Based on the orbital properties of Uranus, how far across the sky in arc seconds does it travel in one Earth
day? The average orbital radius is 2.88 x 109 km and the period is 84.0 years. (Assume Uranus and the Earth
are at the closest point to one another in their orbits.)
How many full Moons does this distance cover if the Moon has an angular diameter of 0.5 degrees?
Part 1 of 4
We first need to determine how fast the planet is moving across the sky. If we know the period and the
distance between the Sun and the planet we can calculate the velocity using:
2ar
which will tell us how many kilometers the planet travels in a day if we convert the period into days.
days
= (P
years'
|days/year
Pdays
days
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Chapter 7 Solutions
21st Century Astronomy
Ch. 7.1 - Prob. 7.1CYUCh. 7.2 - Prob. 7.2CYUCh. 7.3 - Prob. 7.3CYUCh. 7.4 - Prob. 7.4CYUCh. 7.5 - Prob. 7.5CYUCh. 7 - Prob. 1QPCh. 7 - Prob. 2QPCh. 7 - Prob. 3QPCh. 7 - Prob. 4QPCh. 7 - Prob. 5QP
Ch. 7 - Prob. 6QPCh. 7 - Prob. 7QPCh. 7 - Prob. 8QPCh. 7 - Prob. 9QPCh. 7 - Prob. 10QPCh. 7 - Prob. 11QPCh. 7 - Prob. 12QPCh. 7 - Prob. 13QPCh. 7 - Prob. 14QPCh. 7 - Prob. 15QPCh. 7 - Prob. 16QPCh. 7 - Prob. 17QPCh. 7 - Prob. 18QPCh. 7 - Prob. 19QPCh. 7 - Prob. 20QPCh. 7 - Prob. 21QPCh. 7 - Prob. 22QPCh. 7 - Prob. 23QPCh. 7 - Prob. 24QPCh. 7 - Prob. 25QPCh. 7 - Prob. 26QPCh. 7 - Prob. 27QPCh. 7 - Prob. 28QPCh. 7 - Prob. 29QPCh. 7 - Prob. 30QPCh. 7 - Prob. 31QPCh. 7 - Prob. 32QPCh. 7 - Prob. 33QPCh. 7 - Prob. 34QPCh. 7 - Prob. 35QPCh. 7 - Prob. 36QPCh. 7 - Prob. 37QPCh. 7 - Prob. 38QPCh. 7 - Prob. 39QPCh. 7 - Prob. 40QPCh. 7 - Prob. 41QPCh. 7 - Prob. 42QPCh. 7 - Prob. 43QPCh. 7 - Prob. 44QPCh. 7 - Prob. 45QP
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- What is the maximum angular diameter of Uranus as seen from Earth? Of Neptune? (Hint: Use the small-angle formula, Eq. 3-1.) (Note: Necessary data are given in their Celestial Profiles.)arrow_forwardJupiter is approximately a sphere of radius 6.99 x 107 m.(a) What is its circumference in kilometers?(b) What is its surface area in square kilometers?(c) What is its volume in cubic kilometers? Needs Complete typed solution with 100 % accuracy.arrow_forwardIn 2015, researchers concluded that Enceladus's subsurface ocean is probably global, instead of just being restricted to the south polar region. What had the Cassini spacecraft found, that led them to their conclusion? a Enceladus wobbles slightly as it orbits Saturn, more so than it could if its ice shell were mostly frozen to the rocky interior. b Enceladus is absorbing so much water (which is ejected by Saturn from its atmosphere) that there must be a global ocean under its icy surface. c The number of large, lava-spewing volcanoes on Enceladus's surface is so high that they can only be the result of liquid water under the whole surface. d The magnetic field of Enceladus is so strong that it can only be explained by a global ocean of salty water under the surface.arrow_forward
- Compare Titan to Rhea. Estimate the strength of surface gravity on Titan compared to the gravity on Titan. How does this affect the possibility of an atmosphere on each? Use g=GM/R2 Titan Radius: 2,575 km, Mass: 2.31 x 1021 kg Rhea Radius: 764 km, Mass: 1.35 x 1023 kgarrow_forwardThe mass of the planet is approximately 74.8 times the mass of Jupiter. Calculate the average density of the planet. Give your answer in grams per cubic centimeter.arrow_forwardWhy do the upper levels of Neptune’s atmosphere appear blue?arrow_forward
- Describe four differences between the two ice giants, Uranus and Neptune, and the two gas giants, Jupiter and Saturn. (Hint: Review Celestial Profiles for all of these planets.)arrow_forwardThe ring systems around Jupiter and Saturn lie outside those planets respective Roche limits. True or false? How do you know?arrow_forwardJupiter is denser than water, yet composed for the most part of two light gases, hydrogen and helium. What makes Jupiter as dense as it is?arrow_forward
- What is the orbital velocity of Miranda around Uranus? (Hint: Use the formula for circular velocity, Eq. 5-1a. The formula requires input quantities in kg and m.) (Note: Necessary data are given in Celestial Profile: Uranus and Appendix Table A-11.)arrow_forwardThe water clouds believed to be present on Jupiter and Saturn exist at temperatures and pressures similar to those in the clouds of the terrestrial atmosphere. What would it be like to visit such a location on Jupiter or Saturn? In what ways would the environment differ from that in the clouds of Earth?arrow_forward
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