Astronomy
1st Edition
ISBN: 9781938168284
Author: Andrew Fraknoi; David Morrison; Sidney C. Wolff
Publisher: OpenStax
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Chapter 13, Problem 17E
Suppose you were designing a spacecraft that would match course with a comet and move with it for a while. What sorts of instruments would you put on board to gather data, and what would you like to learn?
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It is believed there are 2.7 x 1012 comets in the Oort Cloud, which has a radius of 71000.0 AU. Calculate the average volume that each comet has to itself. Then take the cube root of the average volume per comet to find their typical spacing in AU.
Chapter 13 Solutions
Astronomy
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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 between a comets dust tail and a comets gas tail? What does that tell you about the composition and origin of comets?arrow_forwardWhat evidence indicates that a comets nucleus is rich in ices?arrow_forwardHow do the risks of dying from the impact of an asteroid or comet compare with other risks we are concerned about, such as dying in a car accident or from heart disease or some other natural cause? (Hint: To find the annual risk, go to the library or internet and look up the annual number of deaths from a particular cause in a particular country, and then divide by the population of that country.)arrow_forward
- What is the orbital period of a comet nucleus at the inner edge of the Oort Cloud? What is its orbital velocity? Assume a circular orbit. (Hint: Use Keplers third law, Eq. 4-1) (Note: The circumference of a circle is 2r.)arrow_forwardWhy do astronomers conclude that asteroids were never part of a full-sized planet?arrow_forwardHow do asteroids and comets differ?arrow_forward
- How would studying the chemical composition of only the largest, brightest, and most easily observed asteroids yield potentially misleading information about asteroids in general? Why is this called a selection effect?arrow_forwardHow might a crater made by the impact of a comet with the Moon differ from a crater made by the impact of an asteroid?arrow_forwardWhat are possible fates (or end-states) for comets?arrow_forward
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