21st Century Astronomy And Learning Astronomy By Doing Astronomy (fifth Edition)
5th Edition
ISBN: 9780393613360
Author: Laura Kay, Ana Larson, Stacy Palen, George Blumenthal
Publisher: W. W. Norton & Company
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Chapter 11, Problem 18QP
To determine
The evidence that supports the existence of a global ocean beneath the surface of Europa.
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Density is mass per unit volume. Granite rock weighs about 2.7 g/cm3, water weighs about 1.0 g/cm3. Knowing their sizes, how might you determine whether Europa or Ganymede is hiding a large liquid water ocean beneath an icy crust?
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?
Investigate plans for future study of Europa’s ocean, either from Earth or with spacecraft.
How might they help us learn whether Europa really has an ocean?
Chapter 11 Solutions
21st Century Astronomy And Learning Astronomy By Doing Astronomy (fifth Edition)
Ch. 11.1 - Prob. 11.1CYUCh. 11.2 - Prob. 11.2CYUCh. 11.2 - Prob. 11.3CYUCh. 11.3 - Prob. 11.4CYUCh. 11.4 - Prob. 11.5CYUCh. 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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- How can Titan keep an atmosphere when Titan is smaller than airless Ganymede?arrow_forwardWhat is the evidence for a liquid water ocean on Europa, and why is this interesting to scientists searching for extraterrestrial life?arrow_forwardDoes Titan experience volcanism today? Impact cratering? How do you know?arrow_forward
- What should the interior composition of Titan be if its density is 1.9 g/cm3? How do you know?arrow_forwardGiven that no sunlight can penetrate Europa’s ice shell, what would be the type of energy that could make some form of europan life possible?arrow_forwardIn addition to an atmosphere dominated by nitrogen, how else is Saturn’s moon Titan similar to Earth?arrow_forward
- If you piloted a spacecraft to visit Saturns moons and wanted to land on a geologically old surface, what moon would you choose? Why?arrow_forwardIf Jupiter had a satellite the size of our own Moon orbiting outside the orbit of Callisto, what would you predict for the satellites density and surface features?arrow_forwardWhat is the orbital velocity and period of a ring particle at the outer edge of Saturns A ring? (Hint: Use the formula for circular velocity, Eq. 5-1a. The formula requires input quantities in kg and m.) (Note: The radius of the outer edge of the A ring is 136,500 km.)arrow_forward
- Describe Titan's atmosphere. What did the Cassini/Huygens mission discover about the surface of Titan?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
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