Astronomy
1st Edition
ISBN: 9781938168284
Author: Andrew Fraknoi; David Morrison; Sidney C. Wolff
Publisher: OpenStax
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Textbook Question
Chapter 9, Problem 25E
How might a crater made by the impact of a comet with the Moon differ from a crater made by the impact of an asteroid?
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Which of the following about comets is TRUE?
a. Cometary orbits always lie close to the ecliptic plane
b. Long period comets must originate from well beyond even the Kuiper Belt
c. The Oort cloud is the large cloud of gas surrounding a comet nucleus while it is near the Sun
d. Tails of comets always lie along the path of the orbit
Calculate the force of gravity that exists between an asteroid with a mass of 8.5 × 106 kg and a meteor with a mass of 2,350 kg when the two are 9,600 m apart.
Comet's have two tails, a dust tail and an ion tail, and each tail points in a unique direction. Briefly describe these directions.
Chapter 9 Solutions
Astronomy
Ch. 9 - What is the composition of the Moon, and how does...Ch. 9 - Why does the Moon not have an atmosphere?Ch. 9 - What are the principal features of the Moon...Ch. 9 - Frozen water exists on the lunar surface primarily...Ch. 9 - Outline the main events in the Moon’s geological...Ch. 9 - What are the maria composed of? Is this material...Ch. 9 - The mountains on the Moon were formed by what...Ch. 9 - With no wind or water erosion of rocks, what is...Ch. 9 - What differences did Grove K. Gilbert note between...Ch. 9 - Explain how high-speed impacts form circular...
Ch. 9 - Explain the evidence for a period of heavy...Ch. 9 - How did our exploration of the Moon differ from...Ch. 9 - Summarize the four main hypotheses for the origin...Ch. 9 - What are the difficulties with the capture...Ch. 9 - What is the main consequence of Mercury’s orbit...Ch. 9 - Describe the basic internal structure of Mercury.Ch. 9 - How was the rotation rate of Mercury determined?Ch. 9 - What is the relationship between Mercury’s...Ch. 9 - The features of Mercury are named in honor of...Ch. 9 - What do our current ideas about the origins of the...Ch. 9 - One of the primary scientific objectives of the...Ch. 9 - Apollo astronaut David Scott dropped a hammer and...Ch. 9 - Galileo thought the lunar maria might be seas of...Ch. 9 - Why did it take so long for geologists to...Ch. 9 - How might a crater made by the impact of a comet...Ch. 9 - Why are the lunar mountains smoothly rounded...Ch. 9 - The lunar highlands have about ten times more...Ch. 9 - At the end of the section on the lunar surface,...Ch. 9 - Give several reasons Mercury would be a...Ch. 9 - If, in the remote future, we establish a base on...Ch. 9 - The Moon has too little iron, Mercury too much....Ch. 9 - In the future, astronomers discover a solid moon...Ch. 9 - The Moon was once closer to Earth than it is now....Ch. 9 - Astronomers believe that the deposit of lava in...Ch. 9 - The Moon requires about 1 month (0.08 year) to...
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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
- How do asteroids and comets differ?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_forwardWhat is the difference between a meteoroid and an asteroid? Is there a sharp distinction?arrow_forward
- Give at least two reasons today’s astronomers are so interested in the discovery of additional Earthapproaching asteroids.arrow_forwardWhy are there so many impact craters on our neighbor world, the Moon, and so few on Earth?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_forward
- If a single asteroid 1 km in diameter were to be fragmented into meteoroids 1 m in diameter, how many would it yield? (Hint: The volume of a sphere 43r3 )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_forwardWhy did it take so long for geologists to recognize that the lunar craters had an impact origin rather than a volcanic one?arrow_forward
- 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?arrow_forwardEstimate the mass of the object that formed Meteor Crater in Arizona.arrow_forward
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