Astronomy
1st Edition
ISBN: 9781938168284
Author: Andrew Fraknoi; David Morrison; Sidney C. Wolff
Publisher: OpenStax
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Textbook Question
Chapter 4, Problem 14E
What fraction of the Moon’s visible face is illuminated during first quarter phase? Why is this phase called first quarter?
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Chapter 4 Solutions
Astronomy
Ch. 4 - Discuss how latitude and longitude on Earth are...Ch. 4 - What is the latitude of the North Pole? The South...Ch. 4 - Make a list of each main phase of the Moon,...Ch. 4 - What are advantages and disadvantages of apparent...Ch. 4 - What are the two ways that the tilt of Earth’s...Ch. 4 - Why is it difficult to construct a practical...Ch. 4 - Explain why there are two high tides and two low...Ch. 4 - What is the phase of the Moon during a total solar...Ch. 4 - On a globe or world map, find the nearest marked...Ch. 4 - Explain three lines of evidence that indicate that...
Ch. 4 - What is the origin of the terms “a.m.” and “p.m.”...Ch. 4 - Explain the origin of the leap year. Why is it...Ch. 4 - Explain why the year 1800 was not a leap year,...Ch. 4 - What fraction of the Moon’s visible face is...Ch. 4 - Why don’t lunar eclipses happen during every full...Ch. 4 - Why does the Moon create tidal bulges on both...Ch. 4 - Why do the heights of the tides change over the...Ch. 4 - Explain how tidal forces are causing Earth to slow...Ch. 4 - Explain how tidal forces are causing the Moon to...Ch. 4 - Explain why the Gregorian calendar modified the...Ch. 4 - The term equinox translates as “equal night.”...Ch. 4 - The term solstice translates as “Sun stop.”...Ch. 4 - Why is the warmest day of the year in the United...Ch. 4 - When Earth’s Northern Hemisphere is tilted toward...Ch. 4 - Where are you on Earth if you experience each of...Ch. 4 - In countries at far northern latitudes, the winter...Ch. 4 - What is the phase of the Moon if it . . . A. rises...Ch. 4 - A car accident occurs around midnight on the night...Ch. 4 - The secret recipe to the ever-popular veggie...Ch. 4 - Your great-great-grandfather, who often...Ch. 4 - One year in the future, when money is no object,...Ch. 4 - Suppose you lived in the crater Copernicus on the...Ch. 4 - In a lunar eclipse, does the Moon enter the shadow...Ch. 4 - Describe what an observer at the crater Copernicus...Ch. 4 - The day on Mars is 1.026 Earth-days long. The...Ch. 4 - What is the right ascension and declination of the...Ch. 4 - What is the right ascension and declination of the...Ch. 4 - What is the right ascension and declination of the...Ch. 4 - During summer in the Northern Hemisphere, the...Ch. 4 - On the day of the vernal equinox, the day length...Ch. 4 - Regions north of the Arctic Circle are known as...Ch. 4 - In a part of Earth’s orbit where Earth is moving...Ch. 4 - In a part of Earth’s orbit where Earth is moving...Ch. 4 - If Sirius rises at 8:00 p.m. tonight, at what time...Ch. 4 - What are three lines of evidence you could use to...Ch. 4 - If the Moon rises at a given location at 6:00 p.m....Ch. 4 - Explain why some solar eclipses are total and some...Ch. 4 - Why do lunar eclipses typically last much longer...Ch. 4 - Suppose Earth took exactly 300.0 days to go around...Ch. 4 - Consider a calendar based entirely on the day and...Ch. 4 - If a star rises at 8:30 p.m. tonight,...Ch. 4 - What is the altitude of the Sun at noon on...Ch. 4 - Show that the Gregorian calendar will be in error...
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- Make a list of each main phase of the Moon, describing roughly when the Moon rises and sets for each phase. During which phase can you see the Moon in the middle of the morning? In the middle of the afternoon?arrow_forwardWhat is the phase of the Moon during a total solar eclipse? During a total lunar eclipse?arrow_forwardConsider a calendar based entirely on the day and the month (the Moon’s period from full phase to full phase). How many days are there in a month? Can you figure out a scheme analogous to leap year to make this calendar work?arrow_forward
- Why don’t lunar eclipses happen during every full moon?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_forwardWhat are three lines of evidence you could use to indicate that the phases of the Moon are not caused by the shadow of Earth falling on the Moon?arrow_forward
- What are the relative positions of the Earth, the Sun, and the Moon during a lunar eclipse? During a solar eclipse?arrow_forwardAbout how many days must elapse between first-quarter moon and third-quarter moon in the same cycle?arrow_forwardHow many degrees does the Moon move per day relative to the fixed stars? How many days does it take for the Moon to return to its original location relative to the fixed stars?arrow_forward
- Identify the phases of the moon if at sunset in the northern hemisphere the moon is: (a) near the eastern horizon, (b) high in the southern sky, (c) in the southern sky, (d) in the southwestern sky.arrow_forwardJoe observes how the Moon appears to change over several weeks. He draws the table below to record his observations. Which moon phase occurred between his second and third observations? A full moon B waning gibbous C waxing crescent D waxing gibbousarrow_forwardThe shortest day of the year is during O vernal equinox summer solstice winter solstice O autumnal equinox The moon phases are "waxing" when the moon is? * going from Last Quarter to New Moon O going from a Full Moon to a New Moon O going from a New Moon to a Full Moon meltingarrow_forward
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