Universe
11th Edition
ISBN: 9781319039448
Author: Robert Geller, Roger Freedman, William J. Kaufmann
Publisher: W. H. Freeman
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Chapter 13, Problem 36Q
To determine
To explain: The unexpected features of the Callisto’s surface and interior that were observed by the Galileo spacecraft. Also explain why the presence of these features came as a surprise.
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a) How did scientists use Titan to guide Cassini on a tour of Saturn's moon system?
b) What evidence supports the idea that a relatively recent catastrophic event wasresponsible for Saturn’s rings?
How did Dawn's GRAND instrument detect (probable) ice a short distance under much of Ceres's surface?
a Actually, the GRAND instrument showed that Ceres's surface is probably underlain by a layer of hot molten magma, similar to the magma underneath the volcanoes of Earth or Io
b Dawn used a radar instrument to see through the top layers of impact-shattered bedrock and reveal dense, cold ice.
c It found evidence of hydrogen atoms, which could easily be present in H2O molecules.
d Dawn dropped a series of "impactor" probes onto Ceres's surface, which penetrated a few meters and sampled the ice directly.
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 kg
Chapter 13 Solutions
Universe
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- What is the difference in the orbital velocities of the two shepherd satellites of Uranus, Cordelia and Ophelia, which have orbital radii of 49,800 km and 53,800 km, respectively? (Hint: Use the formula for circular velocity, Eq. 5-1a. The formula requires input quantities in kg and m.)arrow_forwardWhy were the rings of Uranus not observed directly from telescopes on the ground on Earth? How were they discovered?arrow_forwardHow can Titan keep an atmosphere when Titan is smaller than airless Ganymede?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_forwardWhat 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_forwardWe believe that chains of comet fragments like Comet Shoemaker-Levy 9’s have collided not only with the jovian planets, but occasionally with their moons. What sort of features would you look for on the outer planet moons to find evidence of such collisions? (As an extra bonus, can you find any images of such features on a moon like Callisto? You can use an online site of planetary images, such as the Planetary Photojournal, at photojournal.jpl.nasa.gov.)arrow_forward
- Describe Titan's atmosphere. What did the Cassini/Huygens mission discover about the surface of Titan?arrow_forwardPrompt: You are on the Sensor and Data Acquisition engineering team for the new NASA space rover program: the Unmanned Mobile Assessment Drone for Basic Reconnaissance and Observation. Your team is working with a very low budget, and have been given a hand-me-down drone which was repurposed from an old Mars mission. The drone has already landed successfully on Saturn. It’s first task was to travel 4.6 m to a rock and then use it’s built in drill to take a sample. Unfortunately, it appears that the drone stopped very short, only traveling 1.32 m instead of the 4.6 m. Everything about the ultrasonic distance sensor that the drone uses to move with seems to be operating correctly. When you requested details from the drone, it said that the time it took for the 40 kHz ultrasonic sound wave to travel to the rock and back was 0.0108 seconds. Why did the drone only travel 1.32 m, given the 0.0108s echo time?arrow_forwardWhen Dawn studied Ceres more closely from orbit, what did the famous, attention-grabbing feature turn out to be? a Deposits of salt on the floor of Occator crater b A large patch of bare, exposed water ice c A large geyser of liquid water actively shooting out of the surface d A nitrogen-ice glacier, very similar to Pluto's Sputnik Planumarrow_forward
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