EXPLORATIONS:INTRO.TO ASTRONOMY-ACCESS
9th Edition
ISBN: 9781260432251
Author: ARNY
Publisher: MCG
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Chapter 1, Problem 5P
To determine
To be shown that 242 draconic periods very nearly equals 223 synodic periods and how long this is in years. What and why this suggest about the eclipse.
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Chapter 1 Solutions
EXPLORATIONS:INTRO.TO ASTRONOMY-ACCESS
Ch. 1 - (1.1) What is the celestial sphere? What are the...Ch. 1 - (1.1) What is the difference between rotation and...Ch. 1 - (1.1/1.2) What is a constellation, and what is...Ch. 1 - (1.2) What causes the seasons?Ch. 1 - What causes the Moons phases?Ch. 1 - (1.3) How long does it take the Moon to go through...Ch. 1 - (1.2) Why does the position of sunrise along the...Ch. 1 - Why arent there eclipses each month?Ch. 1 - (1.1) If you were standing on Earths equator,...Ch. 1 - Prob. 2TQ
Ch. 1 - (1.1) Can you think of an astronomical reason why...Ch. 1 - Draw sketches to show the angles setting stars...Ch. 1 - Prob. 5TQCh. 1 - Prob. 6TQCh. 1 - (1.2) Why does the position of sunrise along the...Ch. 1 - (1.2) Why do we have time zones? Sketch and label...Ch. 1 - (1.3) Provide two or three pieces of evidence you...Ch. 1 - (1.3) If the Moon orbited Earth in the opposite...Ch. 1 - (1.1) If Earth turns one full rotation in...Ch. 1 - (1.2) From a latitude of 55, what is the highest...Ch. 1 - Prob. 3PCh. 1 - Prob. 4PCh. 1 - Prob. 5PCh. 1 - Prob. 6PCh. 1 - Prob. 7PCh. 1 - Prob. 8PCh. 1 - (1.1) If you are standing at Earths North Pole,...Ch. 1 - Prob. 2TYCh. 1 - Prob. 3TYCh. 1 - Prob. 4TYCh. 1 - (1.2) In which of the following locations can the...Ch. 1 - Prob. 6TYCh. 1 - (1.3) You observe the Moon rising at 6 p.m.,...Ch. 1 - (1.3) You observe the Moon rising at 3 p.m., a few...Ch. 1 - Prob. 9TYCh. 1 - (1.4) Figure 1.22 (right) shows an eclipse of the...Ch. 1 - (1.4) If the Moon were to expand to twice its...
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- Suppose Eratosthenes had found that, in Alexandria, at noon on the first day of summer, the line to the Sun makes an angle 30° with the vertical. What, then, would he have found for Earth’s circumference?arrow_forwardWhich of the following is not a contributing factor in causing eclipses? (17.2) (a) the rotation of the Earth about its axis (b) the inclination of the Moons orbit (c) the varying distance between the Earth and the Moon (d) the varying distance between the Earth and the Sunarrow_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
- How did Aristotle deduce that the Sun is farther away from Earth than the Moon?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_forwardSuppose, hypothetically, that the Earth orbited the Sun at half its current distance. (That is, at 1/2 AU instead of 1 AU). What would be the length of the year? What else would be different?arrow_forward
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