Astronomy
1st Edition
ISBN: 9781938168284
Author: Andrew Fraknoi; David Morrison; Sidney C. Wolff
Publisher: OpenStax
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Textbook Question
Chapter 14, Problem 8E
Explain the role of impacts in planetary evolution, including both giant impacts and more modest ones.
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Chapter 14 Solutions
Astronomy
Ch. 14 - A friend of yours who has not taken astronomy sees...Ch. 14 - In what ways are meteorites different from...Ch. 14 - How are comets related to meteor showers?Ch. 14 - What do we mean by primitive material? How can we...Ch. 14 - Describe the solar nebula, and outline the...Ch. 14 - Why do the giant planets and their moons have...Ch. 14 - How do the planets discovered so far around other...Ch. 14 - Explain the role of impacts in planetary...Ch. 14 - Why are some planets and moons more geologically...Ch. 14 - Summarize the origin and evolution of the...
Ch. 14 - Why do meteors in a meteor shower appear to come...Ch. 14 - What methods do scientists use to distinguish a...Ch. 14 - Why do iron meteorites represent a much higher...Ch. 14 - Why is it more useful to classify meteorites...Ch. 14 - Which meteorites are the most useful for defining...Ch. 14 - Suppose a new primitive meteorite is discovered...Ch. 14 - How do we know when the solar system formed?...Ch. 14 - We have seen how Mars can support greater...Ch. 14 - Present theory suggests that giant planets cannot...Ch. 14 - Why are meteorites of primitive material...Ch. 14 - How long would material take to go around if the...Ch. 14 - Consider the differentiated meteorites. We think...Ch. 14 - Estimate the maximum height of the mountains on a...
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- In the context of the giant planets and the conditions in their interiors, what is meant by “rock” and “ice”?arrow_forwardPresent theory suggests that giant planets cannot form without condensation of water ice, which becomes vapor at the high temperatures close to a star. So how can we explain the presence of jovian-sized exoplanets closer to their star than Mercury is to our Sun?arrow_forwardWhich step(s) listed in the previous question can be eliminated in models that form Jovian planets in thousands of years, a time frame that solves the Jovian problem? Order the following steps in the formation of a Terrestrial planet chronologically: gravitational collapse, accretion, outgassing, condensation, and differentiation.arrow_forward
- Give brief descriptions of both the Kuiper belt and the Oort cloud.arrow_forwardExplain how high-speed impacts form circular craters. How can this explanation account for the various characteristic features of impact craters?arrow_forwardCompare the interior cutaway sketches of the four Jovian planets in their Celestial Profiles. What interior layer(s) is (are) shown in Jupiter and Saturn but not in Uranus and Neptune, and vice versa?arrow_forward
- Describe the solar nebula, and outline the sequence of events within the nebula that gave rise to the planetesimals.arrow_forwardHow does the solar nebula theory explain the significant density difference between the Terrestrial and Jovian planets?arrow_forwardWhat revisions to the theory of planet formation have astronomers had to make as a result of the discovery of exoplanets?arrow_forward
- Order the following steps in the formation of a Terrestrial planet chronologically: gravitational collapse, accretion, out-gassing, condensation, and differentiation.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_forwardDescribe 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_forward
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