Astronomy
1st Edition
ISBN: 9781938168284
Author: Andrew Fraknoi; David Morrison; Sidney C. Wolff
Publisher: OpenStax
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Textbook Question
Chapter 9, Problem 30E
If, in the remote future, we establish a base on Mercury, keeping track of time will be a challenge. Discuss how to define a year on Mercury, and the two ways to define a day. Can you come up with ways that humans raised on Earth might deal with time cycles on Mercury?
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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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- Suppose that, decades from now, NASA is considering sending astronauts to Mars and Venus. In each case, describe what kind of protective gear they would have to carry, and what their chances for survival would be if their spacesuits ruptured.arrow_forwardWhy is there so much more carbon dioxide in the atmosphere of Venus than in that of Earth? Why so much more carbon dioxide than on Mars?arrow_forwardWhat evidence do we have that there was running (liquid) water on Mars in the past? What evidence is there for water coming out of the ground even today?arrow_forward
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