EBK FOUNDATIONS OF ASTRONOMY
14th Edition
ISBN: 8220106820612
Author: Backman
Publisher: YUZU
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Textbook Question
Chapter 21, Problem 2P
How long would radio signals take to travel from Earth to Venus and back if Venus were at its nearest point to Earth? At its farthest point from Earth? (Notes: The
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The Mars Robotic Lander for which we are making these calculations is designed to return samples of rock from Mars after a long time of collecting samples, exploring the area around the landing site, and making chemical analyses of rocks and dust in the landing area. One synodic period is required for Earth to be in the same place relative to mars as when it landed.
Calculate the synodic period (in years) using the following formula:
1/Psyn = (1/PEarth) - (1/PMars)
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Chapter 21 Solutions
EBK FOUNDATIONS OF ASTRONOMY
Ch. 21 - Describe four ways Venus is similar to Earth...Ch. 21 - Why might you expect that Venuss surface...Ch. 21 - Describe and explain changes in Venuss surface...Ch. 21 - Describe sources and sinks of CO2, if any, on...Ch. 21 - Does Venuss surface experience meteorite impacts...Ch. 21 - Describe evidence of crustal movement (horizontal...Ch. 21 - Why isnt the crust of Venus broken into mobile...Ch. 21 - Do either Venus or Mars have composite volcanoes?...Ch. 21 - What evidence can you give that Venus once had...Ch. 21 - What evidence shows that Venus has been resurfaced...
Ch. 21 - Describe four ways Mars is similar to Earth today....Ch. 21 - How are todays atmospheres of Venus and Mars...Ch. 21 - Where is the oxygen on Mars today? How do you...Ch. 21 - Why doesnt Mars have folded mountain ranges like...Ch. 21 - Why isnt the crust of Mars broken into mobile...Ch. 21 - What were the canals on Mars eventually found to...Ch. 21 - How can planetary scientists estimate the ages of...Ch. 21 - Propose an explanation for the nearly pure CO2...Ch. 21 - Prob. 19RQCh. 21 - Describe sources and sinks of CO2, if any, on Mars...Ch. 21 - Does Marss surface experience any meteorite...Ch. 21 - Describe evidence of crustal movement (horizontal...Ch. 21 - What surface features on Mars today indicate that...Ch. 21 - Why are Phobos and Deimos non-spherical? Why is...Ch. 21 - How are a weather radar map and an image of a...Ch. 21 - Atmospheric jet streams on Venus travel at about...Ch. 21 - How long would radio signals take to travel from...Ch. 21 - What is the maximum angular diameter of Venus as...Ch. 21 - The Pioneer Venus orbiter circled Venus with a...Ch. 21 - Calculate the velocity of Venus as it orbits the...Ch. 21 - Prob. 6PCh. 21 - If the Magellan spacecraft transmitted radio...Ch. 21 - Prob. 8PCh. 21 - What is the angular size of Phobos observed from...Ch. 21 - Prob. 10PCh. 21 - Prob. 11PCh. 21 - Deimos is about 13 km in diameter and has a...Ch. 21 - Prob. 1SOPCh. 21 - Mercury averages only 0.39 AU from the Sun, Venus...Ch. 21 - The radius of Mars is about 3400 km, and its moons...Ch. 21 - Look at Figure 21-1. Compare temperature profiles...Ch. 21 - Look at the map of the Hawaiian chain of islands...Ch. 21 - Look at Figure 21-11. Which molecule(s) can escape...Ch. 21 - Volcano Sif Mons on Venus is shown in this radar...Ch. 21 - Olympus Mons on Mars is an enormous volcano. In...
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- The 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_forwardIf you weigh 150 lbs. on the surface of Earth, how much would you weigh on Venus? On Mars?arrow_forwardWhat evidence can you give that Venus once had significant amounts of water? Where did that water come from? Where did it go?arrow_forward
- Would you expect as many impact craters per unit area on the surface of Venus as on the surface of Mars? Why or why not?arrow_forwardDescribe sources and sinks of CO2, if any, on Venus today.arrow_forwardSuppose 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_forward
- Explain the differences between the Grand Canyon on Earth and Valles Marineris on Mars.arrow_forwardWhat evidence is there that Venus was volcanically active about 300600 million years ago?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_forward
- What is the maximum angular diameter of Venus as seen from Earth? (Hint: Use the small-angle formula, Eq. 3-1.) (Note: Necessary data to derive the distance between the objects in that situation are given in the Celestial Profiles for Earth in Chapter 19 and Venus in this chapter.)arrow_forwardAtmospheric jet streams on Venus travel at about 300 km/hr. How long does it take a jet stream to circle the planet once? How many times does the jet stream circle the planet during one solar rotation of the planet? (Notes: The circumference of a sphere is c = d, where d is diameter. The diameter and solar rotation period of Venus are given in Celestial Profile: Venus.)arrow_forwardList several ways that Venus, Earth, and Mars are similar, and several ways they are different.arrow_forward
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