Foundations of Astronomy, Enhanced
13th Edition
ISBN: 9781305980686
Author: Michael A. Seeds; Dana Backman
Publisher: Cengage Learning US
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Chapter 21, Problem 3DQ
To determine
Describe the observation regarding an astronaut visits the surface of the Mercury.
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Part of the "Mars Direct" mission plan involves rotating the spacecraft on its way to Mars to provide the astronauts with a simulation of Martian gravity.
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Due to the need to catch the correct launch window for the trip home, the total duration for a round trip to Mars will have to be
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c. To return to Earth with a Hohmann transfer, the opposite will need to be true:
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[Answer: -75.097°]
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Chapter 21 Solutions
Foundations of Astronomy, Enhanced
Ch. 21 - How does the force of gravity cause tidal coupling...Ch. 21 - As viewed from Earth, how many times does the Moon...Ch. 21 - If the Moon is tidally coupled to Earth, is Earth...Ch. 21 - How can you determine the relative ages of the...Ch. 21 - From looking at images of the Moons near side, how...Ch. 21 - Why did the first Apollo missions land on the...Ch. 21 - Why do planetary scientists hypothesize that the...Ch. 21 - Prob. 8RQCh. 21 - Prob. 9RQCh. 21 - Prob. 10RQ
Ch. 21 - What is the most significant kind of erosion that...Ch. 21 - Provide evidence to support a hypothesis about...Ch. 21 - What evidence can you cite that the Moon had...Ch. 21 - What evidence would you expect to find on the Moon...Ch. 21 - How does the large-impact hypothesis explain the...Ch. 21 - Look at the Celestial Profiles for Earth, the...Ch. 21 - Look at the Celestial Profiles for the Moon and...Ch. 21 - Prob. 18RQCh. 21 - Look at the Celestial Profiles for Earth, the...Ch. 21 - Look at the Celestial Profiles for the Moon and...Ch. 21 - Why are features like the Moons maria not observed...Ch. 21 - What are the relative ages of the intercrater...Ch. 21 - What evidence can you give that Mercury has a...Ch. 21 - Why is it not surprising that there is no evidence...Ch. 21 - What evidence can you give that Mercury had...Ch. 21 - How are the histories of the Moon and Mercury...Ch. 21 - What property of the Moon and Mercury has resulted...Ch. 21 - Prob. 28RQCh. 21 - Prob. 1DQCh. 21 - Prob. 2DQCh. 21 - Prob. 3DQCh. 21 - Prob. 4DQCh. 21 - Look at the right top and bottom images in Figure...Ch. 21 - Calculate the escape velocity of the Moon from its...Ch. 21 - Prob. 3PCh. 21 - Why do small planets cool faster than large...Ch. 21 - The smallest detail visible through Earth-based...Ch. 21 - Prob. 6PCh. 21 - The trenches where Earths seafloor slips downward...Ch. 21 - An Apollo command module orbited the Moon about...Ch. 21 - Prob. 9PCh. 21 - What is the angular diameter of Mercury when it is...Ch. 21 - If you transmit radio signals to Mercury when...Ch. 21 - What is the wavelength of the most intense...Ch. 21 - Suppose you send a probe to land on Mercury, and...Ch. 21 - The smallest detail visible through Earth-based...Ch. 21 - Look at the image of the astronaut on the Moon at...Ch. 21 - Examine the shape of the horizon at the Apollo 17...Ch. 21 - In the photo shown here, astronaut Alan Bean works...
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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_forwardExplain the differences between the Grand Canyon on Earth and Valles Marineris on Mars.arrow_forwardThe gravity on Mars is about 38% that of Earth's gravity. Let's say some cargo has a mass of 15 kg here on Earth. First, what would be the weight of that cargo in kilograms on Mars? Explain your answer. Second, what would be the mass of that cargo in kilograms on Mars? Explain your answer.arrow_forward
- Prompt: You are on the Sensor and Data Acquisition engineering team for the new NASA space rover program: the Unmanned Mobile Assessment Drone for Basic Reconnaissance and Observation. Your team is working with a very low budget, and have been given a hand-me-down drone which was repurposed from an old Mars mission. The drone has already landed successfully on Saturn. It’s first task was to travel 4.6 m to a rock and then use it’s built in drill to take a sample. Unfortunately, it appears that the drone stopped very short, only traveling 1.32 m instead of the 4.6 m. Everything about the ultrasonic distance sensor that the drone uses to move with seems to be operating correctly. When you requested details from the drone, it said that the time it took for the 40 kHz ultrasonic sound wave to travel to the rock and back was 0.0108 seconds. Why did the drone only travel 1.32 m, given the 0.0108s echo time?arrow_forwardThe average distance from Earth to Mars is 1.5 AU. If you send a command using radio waves (a form of light!) to a rover on the Mars surface, how long will you have to wait before you receive the response? Assume the rover responds immediately after it receives the commandarrow_forwardDo you think that the transit method can be used to study the atmosphere of Mercury? [Hint: look at Figure 1]. Explain why, or why not.arrow_forward
- Describe two anomalous features of the rotation of Venus and what might account for them.arrow_forwardThe runaway greenhouse effect and its inverse, the runaway refrigerator effect, have led to harsh, uninhabitable conditions on Venus and Mars. Does the greenhouse effect always cause climate changes leading to loss of water and life? Give a reason for your answer.arrow_forwardDescribe sources and sinks of CO2, if any, on Venus today.arrow_forward
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