ASTRONOMY
17th Edition
ISBN: 9781506698038
Author: OpenStax
Publisher: XANEDU PUBLISHING
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Textbook Question
Chapter 2, Problem 9E
How 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?
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ASTRONOMY
Ch. 2 - From where on Earth could you observe all of the...Ch. 2 - Give four ways to demonstrate that Earth is...Ch. 2 - Explain, according to both geocentric and...Ch. 2 - In what ways did the work of Copernicus and...Ch. 2 - What were four of Galileo’s discoveries that were...Ch. 2 - Explain the origin of the magnitude designation...Ch. 2 - Ursa Minor contains the pole star, Polaris, and...Ch. 2 - How many degrees does the Sun move per day...Ch. 2 - How many degrees does the Moon move per day...Ch. 2 - Explain how the zodiacal constellations are...
Ch. 2 - The Sun was once thought to be a planet. Explain...Ch. 2 - Is the ecliptic the same thing as the celestial...Ch. 2 - What is an asterism? Can you name an example?Ch. 2 - Why did Pythagoras believe that Earth should be...Ch. 2 - How did Aristotle deduce that the Sun is farther...Ch. 2 - What are two ways in which Aristotle deduced that...Ch. 2 - How did Hipparchus discover the wobble of Earth’s...Ch. 2 - Why did Ptolemy have to introduce multiple circles...Ch. 2 - Why did Copernicus want to develop a completely...Ch. 2 - What two factors made it difficult, at first, for...Ch. 2 - What phases would Venus show if the geocentric...Ch. 2 - Describe a practical way to determine in which...Ch. 2 - What is a constellation as astronomers define it...Ch. 2 - Draw a picture that explains why Venus goes...Ch. 2 - Show with a simple diagram how the lower parts of...Ch. 2 - Parallaxes of stars were not observed by ancient...Ch. 2 - Why do you think so many people still believe in...Ch. 2 - Consider three cosmological perspectives-the...Ch. 2 - The north celestial pole appears at an altitude...Ch. 2 - What were two arguments or lines of evidence in...Ch. 2 - Although the Copernican system was largely correct...Ch. 2 - During a retrograde loop of Mars, would you expect...Ch. 2 - The Great Pyramid of Giza was constructed nearly...Ch. 2 - Explain why more stars are circumpolar for...Ch. 2 - What is the altitude of the north celestial pole...Ch. 2 - If you were to drive to some city south of your...Ch. 2 - Hipparchus could have warned us that the dates...Ch. 2 - Explain three lines of evidence that argue against...Ch. 2 - What did Galileo discover about the planet Jupiter...Ch. 2 - What did Galileo discover about Venus that cast...Ch. 2 - Suppose Eratosthenes had found that, in...Ch. 2 - Suppose Eratosthenes’ results for Earth’s...Ch. 2 - Suppose you are on a strange planet and observe,...
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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 are the relative positions of the Earth, the Sun, and the Moon during a lunar eclipse? During a solar eclipse?arrow_forwardIf the Moon orbited Earth from North Pole to South Pole instead of near the ecliptic, would lunar and solar eclipses still occur? Would the moon phase still have to be full or new?arrow_forward
- How many degrees does the Sun move per day relative to the fixed stars? How many days does it take for the Sun to return to its original location relative to the fixed stars?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_forwardPretend the Moons orbit around Earth is a perfect circle. How long does it take in units of days for the Moon to move 90 degrees relative to the stars? Is this number dependent on the synodic period or the sidereal period?arrow_forward
- Consider a person in the United States who sees the first-quarter phase of the Moon. (a) Which side of the Moon is illuminated, east or west? (b) What phase does an observer in Australia see at the same time, and which side is bright?arrow_forwardWhy is it difficult to construct a practical calendar based on the Moon’s cycle of phases?arrow_forwardIdentify the phases of the Moon if on March 20 the Moon is located at the point on the ecliptic called: (a) the vernal equinox, (b) the autumnal equinox, (c) the summer solstice, (d) the winter solstice.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 southeastern sky, (d) in the southwestern sky.arrow_forwardWhen will the eclipse seasons occur during the current year? How many total of all types will occur? Which type of eclipse(s) will occur?arrow_forward
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