Foundations of Astronomy (MindTap Course List)
14th Edition
ISBN: 9781337399920
Author: Michael A. Seeds, Dana Backman
Publisher: Cengage Learning
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Textbook Question
Chapter 3, Problem 11P
At perigee, the Moon is closer than average by 21,100 km. At apogee, the Moon is further than average by 21,100 km. Is the angular diameter more or less at perigee than apogee? What is the angular diameter of the Moon at perigee? At apogee? By how much greater a percentage is the angular diameter larger or smaller at perigee than at the average distance? At apogee? (Hint: The Moon’s average distance from Earth is given in this chapter.)
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Chapter 3 Solutions
Foundations of Astronomy (MindTap Course List)
Ch. 3 - Why are most of the constellations that were...Ch. 3 - Prob. 2RQCh. 3 - Which is the asterism and which is the...Ch. 3 - Prob. 4RQCh. 3 - Prob. 5RQCh. 3 - What does the word apparent mean in apparent...Ch. 3 - Prob. 7RQCh. 3 - Prob. 8RQCh. 3 - Prob. 9RQCh. 3 - Could a solar powered spacecraft generate any...
Ch. 3 - If a lunar eclipse occurred at midnight, where in...Ch. 3 - If Earth had no atmosphere, what color would the...Ch. 3 - If the Moon orbited Earth from North Pole to South...Ch. 3 - Why do solar eclipses happen only at new moon? Why...Ch. 3 - Why isnt the corona visible during partial or...Ch. 3 - Which has the larger angular diameter in the...Ch. 3 - What is the angular diameter of the Moon in the...Ch. 3 - Why cant the Moon be eclipsed when it is halfway...Ch. 3 - Why are solar eclipses separated by one Saros...Ch. 3 - How could Thales of Miletus have predicted the...Ch. 3 - Will an eclipse occur in February 2025? In July...Ch. 3 - How do we know? Some people think science is like...Ch. 3 - Pretend the Moons orbit around Earth is a perfect...Ch. 3 - Identify the phases of the Moon if on March 20 the...Ch. 3 - Identify the phases of the Moon if at sunset in...Ch. 3 - What fraction of the Moons surface area is the far...Ch. 3 - About how many days must elapse between...Ch. 3 - Tonight you see a waning crescent in the night...Ch. 3 - If on March 1 the Moon is full and is near Famous...Ch. 3 - How many times larger than the Moon is the...Ch. 3 - Use the small-angle formula to calculate the...Ch. 3 - Prob. 10PCh. 3 - At perigee, the Moon is closer than average by...Ch. 3 - Examine the list of upcoming lunar eclipses in...Ch. 3 - Prob. 13PCh. 3 - If a solar eclipse occurs on October 3: (a) Why...Ch. 3 - A total eclipse of the Sun was visible from Canada...Ch. 3 - Prob. 16PCh. 3 - When will the eclipse seasons occur during the...Ch. 3 - Examine Figure 3-16. List the letter S for each...Ch. 3 - Arrange the following in order of increasing...Ch. 3 - Prob. 2SOPCh. 3 - Look at the Chapter 2 Concept Art: The Sky Around...Ch. 3 - To take the photos that are combined on the...Ch. 3 - Look at the Chapter 3 Concept Art: The Phases of...Ch. 3 - Look at the Chapter 3 Concept Art: The Phases of...Ch. 3 - Use the photos in Figure 3-1 as evidence to show...Ch. 3 - Prob. 6LTLCh. 3 - Prob. 7LTLCh. 3 - Prob. 8LTLCh. 3 - What evidence of the Saros cycle can you see in...Ch. 3 - The accompanying cartoon shows a crescent moon....Ch. 3 - This photo shows the annular eclipse of May 30,...
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- As viewed from Earth, how many times does the Moon rotate during one orbit? As viewed from outside the EarthMoon system, how many times does the Moon rotate in one orbit? How do you know?arrow_forwardWhat fraction of the Moons surface area is the far side? Of the near side of a third-quarter moon, what fraction is dark? What fraction of the far side is in the dark that cannot be seen by an observer from Earth viewing the Moon in its third-quarter phase?arrow_forwardAn Apollo command module orbited the Moon about 100 km above the surface. What was its orbital velocity? What was its orbital period? (Hint: Use the formula for circular velocity, Eq. 5-1a.) (Note: Relevant information can be found in Celestial Profile: The Moon.)arrow_forward
- Which is the phase of Venus when it is closest? Which when farthest? How do you know?arrow_forwardIf the Moon is tidally coupled to Earth, is Earth tidally coupled to the Moon? How do you know?arrow_forwardWhat is the angular diameter of the Moon in the third-quarter phase? What is the shortest/longest angular distance from the horizon to the Moon in the third-quarter phase when the time is midnight or noon?arrow_forward
- The smallest detail visible through Earth-based telescopes is about 1 arc second in diameter. What linear size is this on the Moon? (Hint: Use the small-angle formula, Eq. 3-1.)arrow_forwardWhat is the composition of the Moon, and how does it compare to the composition of Earth? Of Mercury?arrow_forwardWhy cant the Moon be eclipsed when it is halfway between the nodes of its orbit?arrow_forward
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