Astronomy
1st Edition
ISBN: 9781938168284
Author: Andrew Fraknoi; David Morrison; Sidney C. Wolff
Publisher: OpenStax
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Textbook Question
Chapter 13, Problem 9E
Describe the nucleus of a typical comet and compare it with an asteroid of similar size.
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Calculate the orbital period of a comet nucleus in the Oort cloud.
For the following, determine whether the type of explanation offered is theoretical (the kind used in inference to the best explanation) or nontheoretical (e.g., teleological, interpretive, procedural).
No one noticed the comet before because of cloud cover.
As of 2012, how many near-Earth asteroids, with sizes over 1km, had been discovered by the Spaceguard survey?
a Only a few dozen
b Nearly 1000
c Nearly 50,000
d About 500
Chapter 13 Solutions
Astronomy
Ch. 13 - Why are asteroids and comets important to our...Ch. 13 - Give a brief description of the asteroid belt.Ch. 13 - Describe the main differences between C-type and...Ch. 13 - In addition to the ones mentioned in Exercise...Ch. 13 - Vesta is unusual as it contains what mineral on...Ch. 13 - Compare asteroids of the asteroid belt with...Ch. 13 - Briefly describe NASA’s Spaceguard Survey. How...Ch. 13 - Who first calculated the orbits of comets based on...Ch. 13 - Describe the nucleus of a typical comet and...Ch. 13 - Describe the two types of comet tails and how each...
Ch. 13 - What classification is given to objects such as...Ch. 13 - Describe the origin and eventual fate of the...Ch. 13 - What evidence do we have for the existence of the...Ch. 13 - Give brief descriptions of both the Kuiper belt...Ch. 13 - Give at least two reasons today’s astronomers are...Ch. 13 - Suppose you were designing a spacecraft that would...Ch. 13 - Suppose you were designing a spacecraft that would...Ch. 13 - Suppose a comet were discovered approaching the...Ch. 13 - We believe that chains of comet fragments like...Ch. 13 - Why have we found so many objects in the Kuiper...Ch. 13 - Why is it hard to give exact diameters for even...Ch. 13 - Refer to Example 13.1. How would the calculation...Ch. 13 - Refer to Example 13.1. How would the calculation...Ch. 13 - The calculation in Example 13.1 refers to the...Ch. 13 - If the Oort cloud contains 1012 comets, and ten...Ch. 13 - The mass of the asteroids is found mostly in the...Ch. 13 - Make a similar estimate for the mass of the Kuiper...Ch. 13 - What is the period of revolution about the Sun for...Ch. 13 - What is the period of revolution for a comet with...
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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 meteoroid and an asteroid? Is there a sharp distinction?arrow_forwardIn what ways are meteorites different from meteors? What is the probable origin of each?arrow_forwardRefer to Example 13.1. How would the calculation change if a typical comet in the Oort cloud is only 1 km in diameter?arrow_forward
- What is the asteroid's orbital radius? What is the asteroid's orbital speed?arrow_forwardWhy is the composition of a comet typically dominated by volatile materials (frozen ices)? choose one of the following: a. rock and metal could not condense out of the solar nebula at extreme distances from the sun b. most of the metal in the solar system is locked up inside the terrestrial planets c. metals are not stable in the outer solar system d. elements that form ices (as opposed to rock & metals) are more abundant in our solar systemarrow_forwardWhat is the maximum possible aphelion distance for a short-period comet with an orbital period of 125 years?arrow_forward
- Find the mass of a hypothetical spherical asteroid 4 km in diameter and composed of rock with an average density of 2400 km/ cubic meter. (b) Find the speed required to escape from the surface of this asteroid. (c) A typical jogging speed is 3 m/s. What would happen to an astronaut who decided to go for a jog on this asteroid?arrow_forwardWhat 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_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
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