21st Century Astronomy
6th Edition
ISBN: 9780393428063
Author: Kay
Publisher: NORTON
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Chapter 3, Problem 5QP
To determine
Time a planet takes to come back to the same position.
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Why is a sidereal day shorter than a solar day?
O A. precession of Earth's axis
B. the non-circular orbit of Earth around the Sun
C. the tilt of Earth's axis
D. the combined effect of the rotation of Earth and its orbit about the Sun
E. Earth year being a non-integer number of Earth days
1. The reason that there are two daily tides on Earth is that one occurs when the sun is overhead and the other when the Moon is overhead.
True or False
2. Tides are approximately 24 hours apart.
True or False
8. The mean distance of Earth from the Sun is 149.6 x 10° km and the mean distance of
Mercury from the Sun is 57.9 x 10° km. The period of Earth's revolutions is 1 year,
what is the period of Mercury's revolution?
a. 0.24 year on Earth
b. 0.42 year on Earth
C. 1.13 year on Earth
d. 1.31 year on Earth
9. The planet Delta has 2 times the gravitational field strength and 3 times the radius of
Earth. How does the mass of the planet Delta compare with the mass of Earth?
Chapter 3 Solutions
21st Century Astronomy
Ch. 3.1 - Prob. 3.1ACYUCh. 3.1 - Prob. 3.1BCYUCh. 3.2 - Prob. 3.2CYUCh. 3.3 - Prob. 3.3CYUCh. 3.4 - Prob. 3.4CYUCh. 3 - Prob. 1QPCh. 3 - Prob. 2QPCh. 3 - Prob. 3QPCh. 3 - Prob. 4QPCh. 3 - Prob. 5QP
Ch. 3 - Prob. 6QPCh. 3 - Prob. 7QPCh. 3 - Prob. 8QPCh. 3 - Prob. 9QPCh. 3 - Prob. 10QPCh. 3 - Prob. 11QPCh. 3 - Prob. 12QPCh. 3 - Prob. 13QPCh. 3 - Prob. 14QPCh. 3 - Prob. 15QPCh. 3 - Prob. 16QPCh. 3 - Prob. 17QPCh. 3 - Prob. 18QPCh. 3 - Prob. 19QPCh. 3 - Prob. 20QPCh. 3 - Prob. 21QPCh. 3 - Prob. 22QPCh. 3 - Prob. 23QPCh. 3 - Prob. 24QPCh. 3 - Prob. 25QPCh. 3 - Prob. 26QPCh. 3 - Prob. 27QPCh. 3 - Prob. 28QPCh. 3 - Prob. 29QPCh. 3 - Prob. 30QPCh. 3 - Prob. 31QPCh. 3 - Prob. 32QPCh. 3 - Prob. 33QPCh. 3 - Prob. 34QPCh. 3 - Prob. 35QPCh. 3 - Prob. 36QPCh. 3 - Prob. 37QPCh. 3 - Prob. 38QPCh. 3 - Prob. 39QPCh. 3 - Prob. 40QPCh. 3 - Prob. 41QPCh. 3 - Prob. 42QPCh. 3 - Prob. 43QPCh. 3 - Prob. 44QPCh. 3 - Prob. 45QP
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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_forwardKepler's third law of planetary motion describes a relationship between the__ * a, shape of orbit and the location of the Sun. b. orbital velocity and position in orbit c. distance from the Sun and length of year. d. path of epicycle and position.arrow_forwardEach 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.arrow_forward
- TRUE OR FALSE only. 1. DIURNAL MOTION is caused by the daily motion of a planet on its axis. 2. Eudoxus was the first to propose that the sun is the center of the solar system. 3. The most perfect shape of the earth and universe according to Plato is cylindrical. 4. Ancient astronomers believed that the Earth did not move because there was no stellar parallax observed. 5. Galileo's observation of the planets supported the geocentric theory. 6. The planet closest to the sun has the shortest period of revolution about the sun. 7. In the proposed model by Copernicus, the earth was at the center of the universe. 8. Epicycles refer to the circular paths taken by planets. 9. The second law of planetary motion implies that the product of the velocity and the distance from the sun remain the same as a planet moves about the sun. 10. The first law implies that there is a common principle that governs the orbital motion of the planets.arrow_forwardAstronomy help 73. Saturn has an angular size of 16”, and an observed Synodic Period of 1.035yrs. Saturn’s moon, Titan orbits the planet with an angular separation of 192”, with a period of 15.9days. From these observations we can determine Saturn’s mass. Find the Sidereal Period of Saturn from the above data. 74. Saturn has an angular size of 16”, and an observed Synodic Period of 1.035yrs. Saturn’s moon, Titan orbits the planet with an angular separation of 192”, with a period of 15.9days. From these observations we can determine Saturn’s mass. Use the Sidereal Period of Saturn above to find the distance to Saturn from the Sun.arrow_forwardSaturn has an angular size of 16”, and an observed Synodic Period of 1.035yrs. Saturn’s moon, Titan orbits the planet with an angular separation of 192”, with a period of 15.9days. From these observations we can determine Saturn’s mass. Use the Sidereal Period of Saturn above to find the distance to Saturn from the Sun.arrow_forward
- 25. The mean distance of Earth from the Sun is 149.6 x 10° km and the mean distance of Mercury from the Sun is 57.9 x 106 km. The period of Earth's revolutions is 1 year, what is the period of Mercury's revolution? a. 0.24 year on Earth b. 0.42 year on Earth C. 1.13 year on Earth d. 1.31 year on Eartharrow_forwardFor an orbit that has a 4 hour period, is sun-synchronous, and has a constant argument of perigee, find the following. a. semi-major axis b. eccentricity c. inclinationarrow_forwardYou are in a space station on Jupiter and you are observing Saturn. Calculate the synodic periodarrow_forward
- 1. The average orbital distance of Mars is 1.52 times the average orbital distance of the Earth. Knowing that the Earth orbits the sun in approximately 365 days, use Kepler's law of harmonies to predict the time for Mars to orbit the sun.arrow_forwardThe planet in the orbit shown in the drawing obeys Kepler s 2nd Law. B During which of the portions of the planet's orbit would the planet experience an increase in speed for at least one moment? A. Only during one of the portions shown. B. During two of the portions shown. C. During three of the portions shown. D. During four of the portions shown. O E. None of the above.arrow_forwardAccording to Lunar Laser Ranging experiments the average distance LM from the Earth to the Moon is approximately 3.85 × 10° km. The Moon orbits the Earth and completes one revolution in approximately 27.5 days (a sidereal month). How can the mass of the Earth be calculated using the information above? Select the correct statements. Select one or more: O a. Use Newton's third law. O b. Use Newton's first law. c. Use Coulombs law. O d. Use Newton's second law.arrow_forward
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