Universe: Stars And Galaxies
6th Edition
ISBN: 9781319115098
Author: Roger Freedman, Robert Geller, William J. Kaufmann
Publisher: W. H. Freeman
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Chapter 3, Problem 2Q
To determine
(a)
To explain:
Moon exhibits phases.
To determine
(b)
To explain:
The phases of the Moon are not due to the shadow of the Earth.
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Students have asked these similar questions
There are 12 lunar months in a lunar calendar. The numbers of days of the lunar months differ by at most one day. The average number of days of a lunar month is approximately equal to the period of the lunar phase cycle. One year in a solar calendar is approximately equal to the period of the cycle of seasons. Which of the following can roughly keep a lunar calendar synchronized with a solar calendar?
a) Adding a thirteenth lunar month to 7 out of every 19 years.
b) Adding an extra day every 4 years.
c) Having an extra month with 5 days each year.
d) Skipping a lunar month every 7 out of 19 years.
1) You are at the Tropic of Capricorn (23.5 degrees South latitude), on the summer solstice at mid-
day when the Sun is highest in the sky. A) What is the altitude of the Sun at this time in degrees?
B) Describe the length of the shadow of a tall flagpole at this time and date? C) Melbourne is at
latitude 28 degrees North. Will there ever be a day when the flagpole's shadow disappears?
Briefly justify your answers.
Each year, the radius of the moon’s orbit increases by about 3.8 cm. How does this change affect the length of a month?A. A month gets longer.B. A month gets shorter.C. The length of a month stays the same.
Chapter 3 Solutions
Universe: Stars And Galaxies
Ch. 3 - Prob. 1QCh. 3 - Prob. 2QCh. 3 - Prob. 3QCh. 3 - Prob. 4QCh. 3 - Prob. 5QCh. 3 - Prob. 6QCh. 3 - Prob. 7QCh. 3 - Prob. 8QCh. 3 - Prob. 9QCh. 3 - Prob. 10Q
Ch. 3 - Prob. 11QCh. 3 - Prob. 12QCh. 3 - Prob. 13QCh. 3 - Prob. 14QCh. 3 - Prob. 15QCh. 3 - Prob. 16QCh. 3 - Prob. 17QCh. 3 - Prob. 18QCh. 3 - Prob. 19QCh. 3 - Prob. 20QCh. 3 - Prob. 21QCh. 3 - Prob. 22QCh. 3 - Prob. 23QCh. 3 - Prob. 24QCh. 3 - Prob. 25QCh. 3 - Prob. 26QCh. 3 - Prob. 27QCh. 3 - Prob. 28QCh. 3 - Prob. 29QCh. 3 - Prob. 30QCh. 3 - Prob. 31QCh. 3 - Prob. 32QCh. 3 - Prob. 33QCh. 3 - Prob. 34QCh. 3 - Prob. 35QCh. 3 - Prob. 36QCh. 3 - Prob. 37QCh. 3 - Prob. 38QCh. 3 - Prob. 39QCh. 3 - Prob. 40QCh. 3 - Prob. 41QCh. 3 - Prob. 42QCh. 3 - Prob. 43QCh. 3 - Prob. 44QCh. 3 - Prob. 45QCh. 3 - Prob. 46QCh. 3 - Prob. 47QCh. 3 - Prob. 48QCh. 3 - Prob. 49QCh. 3 - Prob. 50Q
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- In a part of Earth’s orbit where Earth is moving faster than usual around the Sun, would the length of the solar day change? If so, how? Explain.arrow_forwardExamine the list of upcoming lunar eclipses in Table 3-1. What fraction of years have two eclipses?arrow_forwardIf a solar eclipse occurs on October 3: (a) Why can’t there be a lunar eclipse on October 13 of that same year? (b) Why can’t there be a solar eclipse on December 28 of that same year?arrow_forward
- The diameter of the Moon across its equator is 3476 kilometers. If a kilometer equals 0.6214 miles, what is the Moon’s diameter in miles?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_forwardWhich of the following groups of moon phases are above the horizon at 8 pm? A. third quarter, waning crescent, and waxing gibbous B. new Moon, third quarter, and waning gibbous O C. waxing gibbous, full Moon, waning gibbous D. waxing crescent, first quarter, waxing gibbous O E. None. The Moon is only visible above the horizon during the night time.arrow_forward
- (a) Explain the relative positions of the Earth, Sun, and Moon during a solar eclipse? (b) Explain the relative positions of the Earth, Sun, and Moon during a lunar eclipse? (c) Does a solar eclipse occur during a full moon, a new moon, or a quarter moon? (d) Does a lunar eclipse occur during a full moon, a new moon, or a quarter moon? (e) What is the name of the total shadow during a solar eclipse? () What is the name of the partial shadow during a solar ecipse?arrow_forwardAssume you live on the Moon near the center of the face that looks toward Earth. a. If you saw a full Earth in your sky, what phase of the Moon would people on Earth see? Draw a diagram. b. If people on Earth saw a full moon, what phase would you see for Earth? Draw a diagram. c. If people on Earth saw a waxing gibbous moon, what phase would you see for Earth? Draw a diagram. d. If people on Earth were viewing a total lunar eclipse, what would you see from your home on the Moon? Draw a diagram. Why were the main reasons why the idea that the Earth was at the center of the universe lasted so long? Discuss in 2 paragraphs the observations made by Galileo that disproved Geocentrism. Which one do you think was the most important? Write down a hypothesis and observational experiment to test one of Newton’s laws of motion. EXPLAIN YOUR REASONING! One of the first exoplanets discovered orbits the star 51 Pegasi with a period of just 4.2 days. 51 Pegasi is very similar to the Sun. Use Kepler’s…arrow_forwardBased on what you've learn on the impact of the Earth-Sun distance on the seasons, what can you say about the the cause of the seasons? (Give ALL correct answers, i.e., B, AC, BCD...)A) Earth's axis is tilted an an angle of 23.5 degrees compared to a line perpendicular (straight up and down) to its orbit, which is the main cause for the seasons.B) Earth's speed varies in its orbit around the Sun, giving us summer when Earth is moving fastest and winter when Earth is moving slowest.C) The Earth-Sun distance play a major role in creating seasons on Earth.D) The tilt of Earth's axis causes the Northern Hemisphere to be closer to the Sun than the southern hemisphere in summer, and vice versa in winter. E) The tilt of Earth's axis causes different portions of the Earth to receive more or less direct sunlight at different times of year.F) Earth's Northern Hemisphere is always tilted away from the Sun at an angle of 23.5 degrees.G) Earth's Northern Hemisphere is always tilted toward the Sun…arrow_forward
- When can a total solar eclipse occur: (Give ALL correct answers, i.e., B, AC, BCD...) A) only in spring. B) only at new moon. C) at any time of year. D) anywhere on Earth. E) only at full moon. F) only at the equator.arrow_forwardIf the Moon is in the waning gibbous phase tonight, approximately how long will it be until the Moon is in the waning crescent phase? A. a month B. one week C. one day O D. three weeks E. two weeksarrow_forwardSolar eclipse will take place when: A. the sun is between the moon and the earth B. the earth is between the moon and the sun C. the moon is between the sun and the earth D. the moon does not lie on the line joining the sun and the eartharrow_forward
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