ASTRO 1010: quiz 1
100. The period 27.3 days is: a) a sidereal month. b) a sidereal day. c) a solar day. d) a lunar (synodic) month. e) the precession period for the Earth's poles.
A
15. For an observer in Johnson City, the time that it takes the star Aldebaran to appear to orbit the Earth and return to the same position on the sky is: a) 23 hours 56 minutes. b) 24 hours. c) 27.3 days. d) 29.5 days. e) Aldebaran does not rise or set: it is always in the same location in the sky.
A
2. The distance from the Earth to the Sun is: a) an astronomical unit. b) a light year. c) a billion miles. d) 50,000 kilometers. e) 24 hours right ascension.
A
23. Where would you have to be on Earth to see the North Celestial Pole at your zenith? a) the North Pole. b) the South Pole. c) the Equator. d) Johnson City. e) it depends upon the season.
A
3. The precession of the Earth's spin axis is caused by: a) the gravitational pull of the Moon and the Sun on the Earth's bulge. b) the retrograde motion of Mars. c) the gravitational pull of the zodiacal constellations. d) the gravitational effect of the vernal equinox. e) the gravitational pull of Venus and Mars.
A
39. The planets: a) Move faster in their orbit around the Sun, in km/s, the closer they are to the Sun. b) Are always located at the same Right Ascension and Declination in the sky. c) Are always found along the Celestial Equator. d) Are always located at Declinations greater than 60 degrees. e) Are always observed along the meridian.
A
4. Retrograde motion of a planet when viewed from Earth is caused by: a) the relative motions of the Earth and the planet. b) the inclination of its orbit to the plane of the ecliptic. c) the non-circular orbit of the planet. d) the gravitational pull of the Sun and Moon on the Earth. e) the gravitational pull of the zodiacal constellations.
A
40. In a degree of angle, there are: a) 3600 arcseconds. b) 3600 arcminutes. c) 60 arcseconds. d) 24 hours of Right Ascension. e) 1 arcminute.
A
41. The Sun, the Earth, and Pluto line up, with Pluto in opposition to the Sun: a) Every 366.7 days, just a few days longer than a sidereal year on Earth. b) Every 88 days, so about four times every year. c) Every 29.5 days, so about 12 times a year. d) Every 249 years. e) Every 24 hours.
A
43. Mars move eastwards relative to the stars for most of the year, however, every 780 days it changes direction and goes west, and then reverses and moves eastwards again. This is because: a) The Earth has caught up and passed Mars in its orbit. b) Mars stops in its orbit around the Sun, and goes backwards, in the opposite direction. c) The Earth is tilted on its axis by 23.5 degrees. d) The gravitational pull of Mars' moons changes its orbit around the Sun. e) The Earth wobbles on its axis, with a period of 780 days.
A
44. During the vernal equinox: a) the sun is at the zenith at noon for an observer on the Earth's equator. b) is the only time solar and lunar eclipses occur. c) the Sun, Earth, and Moon are lined up. d) the moon is in the constellation of Ursa Major. e) Venus is visible at midnight.
A
46. Planet A and Planet B have the same angular size on the sky. Planet A is known to be five times farther away from us. Therefore: a) The physical diameter of Planet A is five times bigger than that of Planet B. b) The physical diameter of Planet A is equal to that of Planet B. c) The physical diameter of Planet A is 1/5th that of Planet B. d) The physical diameter of Planet A is 25 times bigger than that of Planet B. e) The physical diameter of Planet A is 1/25th that of Planet B.
A
5. The sidereal day is equal to: a) 23 hours 56 minutes. b) the solar day plus 4 minutes. c) the solar day plus 56 minutes. d) 24 hours. e) 29.5 days.
A
53. How many arcseconds are there in an arcminute? a) 60. b) 360. c) 3600. d) 1/60. e) 100.
A
57. The city of Augusta Maine is at 44 degrees North latitude and 72 degrees West longitude. If you were in Augusta, a star at your zenith would have a declination of: a) 44 degrees. b) 72 degrees. c) 90 - 44 = 46 degrees. d) 90 - 72 = 18 degrees. e) 90 degrees.
A
62. At what time of day is it possible to see a full moon? a) From 6 PM until 6 AM. b) From midnight until noon. c) From 6 AM until 6 PM. d) From noon until midnight. e) Any time of day.
A
63. The star Deneb crossed the meridian at 11:05 PM on September 7, 2002 for an observer in Johnson City. When did it cross the meridian on September 8? a) 11:01 PM. b) 11:05 PM. c) 11:07 PM. d) 11:09 PM. e) 11:11 PM.
A
65. During the autumnal equinox: a) The Declination of the Sun is 0 degrees. b) The Declination of the Sun is 23.5 degrees. c) The Declination of the Sun is -23.5 degrees. d) The Declination of the Sun is 90 degrees. e) The Declination of the Sun is 12 hours.
A
71. On the Vernal Equinox: a) The Declination of the Sun is 0 degrees. b) The Declination of the Sun is 23.5 degrees. c) The Declination of the Sun is -23.5 degrees. d) The Declination of the Sun is 90 degrees. e) The Declination of the Sun is 12 hours.
A
87. The Declination of the Sun at the Winter Solstice is: a) -23.5 degrees. b) 0 degrees. c) 23.5 degrees. d) 90 degrees. e) 180 degrees.
A
88. During what phase of the Moon do lunar eclipses happen? a) Full Moon. b) First quarter Moon. c) Third quarter Moon. d) New Moon. e) Waxing Crescent.
A
91. A first quarter Moon rises at about: a) noon. b) midnight. c) 6 PM. d) 6 AM. e) 3 AM.
A
99. The celestial meridian is: a) The line on the sky that goes from the northern horizon through the zenith to the southern horizon. b) The line on the sky that goes from the eastern horizon through the zenith to the western horizon. c) The projection of the Earth's latitude lines onto the sky. d) The path the Sun takes across the sky. e) The projection of the Earth's equator onto the sky.
A
16. The angle covered by the full moon on the sky is approximately: a) 0.5 degrees. b) 30 arcminutes. c) 1800 arcseconds. d) all of the above. e) none of the above.
D
22. Two identical Boeing 747 airplanes are coming in to land at Chicago O'Hare airport. The United Airlines airplane is 2 miles away from the airport, while the USAirways plane is 4 miles away. The angular size of the United Airlines plane, as seen by an observer at the airport, is: a) 4 times bigger than the USAirways plane. b) 2 times bigger than the USAirways plane. c) 1/2 as big as the USAirways plane. d) 1/4 as big as the USAirways plane. e) the same as the USAirways plane.
B
26. On the day of the Summer Solstice, which of the following conditions hold? a) Both the day and night are 12 hours long. b) The northern hemisphere of Earth is tilted towards the Sun: sunlight hits the surface of Earth most directly. c) The Sun crosses the Celestial Equator. d) The moon, Sun, and Earth are always aligned. e) The Sun passes through the Big Dipper.
B
34. A full moon rises: a) At noon. b) At 6 PM. c) At midnight. d) At 6 AM. e) Anytime between noon and midnight, depending on the season.
B
38. During a first quarter moon: a) it is possible to see a solar eclipse. b) the moon rises at noon. c) the Earth's shadow blocks half the face of the moon. d) the Earth is tilted away from the Sun. e) the Sun, Earth, and Moon are lined up.
B
47. A constellation is: a) A group of stars in the sky that are all the same distance away from us. b) A pattern of stars in the sky, made up of star near each other in the sky but not necessarily near each other in space. c) The stars that lie along the ecliptic. d) The stars that lie near the Celestial North Pole. e) The stars that never set below the horizon.
B
49. The constellation of Virgo has a declination of 0 degrees. This means: a) It lies directly above the North Pole. b) It lies directly above the equator of Earth. c) It is at the Celestial South Pole. d) It lies directly above Greenwich England. e) It is at the zenith for an observer in Johnson City.
B
56. Which of the following statements about synchronous rotation is correct? a) The Earth and Moon are both synchronously rotating with each other. b) The Moon is synchronously rotating with the Earth, but not vice versa. c) The Earth is synchronously rotating with the Moon, but not vice versa. d) The only Moon in the solar system which is synchronously rotating with its planet is Charon. e) The Earth is synchronously rotating with the Sun.
B
61. During the summer solstice: a) the sun lies directly above the Earth's equator. b) the declination of the Sun is 23.5 degrees North. c) the Sun, Earth, and Moon are lined up. d) Mars is at opposition. e) The Earth is closest to the Sun.
B
67. Two pine trees are seen in the distance. Tree A has an angular size of 5 degrees, while Tree B has an angular size of 1 degree. Assuming the two trees have the same true physical height, the distance to Tree A is: a) 5 times bigger than the distance to Tree B. b) 1/5th of the distance to Tree B. c) the same as the distance to Tree B. d) 25 times bigger than the distance to Tree B. e) 1/25th of the distance to Tree B.
B
69. Pluto is at opposition every 1.005 years, while Mars is at opposition every 2.14 years. The reason Mars' oppositions are so less often is: a) Mars' orbital velocity around the Sun, in km/s, is slower than that of Pluto. b) Mars is closer to the Earth, and so has an orbital velocity and orbital path length closer to that of the Earth's. c) Mars spins more slowly on its axis than Pluto. d) Pluto's moon is closer to Pluto than Mars' moons are to Mars. e) Mars occasionally moves backwards across the sky.
B
70. During its full phase, the Moon rises at approximately: a) noon. b) 6 PM. c) midnight. d) 6 AM. e) 3 AM.
B
73. The Moon sets at midnight when it is in which of the following phases? a) Full. b) First quarter. c) Third quarter. d) None of the above. e) All of the above.
B
85. Which of the following statements about tidal locking is correct? a) The Earth and Moon are tidally locked to each other. b) The Moon is tidally locked to the Earth, but not vice versa. c) The Earth is tidally locked to the Moon, but not vice versa. d) The only Moons in the solar system which are tidally locked to its planet are the moons of Mars. e) No moons in our solar system are tidally locked to their planet.
B
86. During what phase is the Moon highest in the sky at 6 PM? a) Full Moon. b) First quarter Moon. c) Third quarter Moon. d) New Moon. e) Waxing Crescent.
B
90. For an observer in the northern hemisphere of Earth, the angle between Polaris and the northern horizon: a) is equal to the equinox of the observer. b) is equal to the latitude of the observer. c) is equal to the longitude of the observer. d) is equal to the meridian of the observer. e) is equal to the ecliptic of the observer.
B
The celestial equator is: a) the plane of the Earth's orbit around the Sun. b) the projection of the Earth's equator on the celestial sphere. c) when the moon passes between the Earth and the Sun d) the point in the sky directly above you. e) the shadow of the moon on the Earth.
B
10. On the day of the Vernal Equinox (approximately March 21 each year), which of the following conditions hold? a) It is the longest day of the year (in terms of length of daylight). b) The northern hemisphere of Earth is tilted directly towards the Sun: sunlight hits the surface of Earth most directly. c) The Sun crosses the Celestial Equator. d) The moon, Sun, and Earth are always aligned. e) The Sun passes through the Big Dipper.
C
11. The star Polaris: a) Is always at the zenith in Johnson City. b) Is at the zenith in Johnson City on the Vernal Equinox. c) Is always above the horizon in Johnson City. d) Is located on the Celestial Equator. e) Is located near the ecliptic.
C
28. The synodic period (synodic year) of Pluto is 366.7 days. This means: a) It takes Pluto 366.7 days to make a complete orbit of the Sun with respect to the stars. b) Pluto spins once on its axis in 366.7 days. c) It takes 366.7 days for the Earth to orbit the Sun and return to the same alignment with respect to Pluto and the Sun. d) The rotational axis of Pluto is slowly precessing with time, with a period of 366.7 days. e) Pluto is moving at almost the same speed in its orbit as Earth.
C
31. The moon is in synchronous rotation with the Earth. This means: a) The moon always keeps the same face to the Sun. b) The length of a day on the surface of the moon (sunrise to sunrise) is 24 hours. c) The moon always keeps the same face to the Earth. d) The moon spins 29.5 times on its axis during a lunar month. e) A lunar month equals a sidereal month.
C
33. The number 50,000,000 can be written: a) 5 X 10-7. b) 5 X 17. c) 5 X 107. d) 57 e) 5 billion.
C
37. An annular eclipse is: a) a lunar eclipse. b) when the moon is in the Earth's shadow. c) when the angular size of the Moon is too small to block the full face of the Sun. d) an eclipse that occurs every December. e) a solar eclipse that occurs during a full moon.
C
45. The ecliptic is: a) the projection of the Earth's equator on the sky. b) the path of the moon across the sky. c) the plane of the Earth's orbit around the Sun. d) the point on the sky directly above an observer. e) the line (arc) on the sky that runs from horizon to horizon, through the point directly above you and the Celestial North Pole.
C
48. The moon: a) spins once on its axis relative to the Sun every 23 hours 56 minutes. b) spins once on its axis relative to the Sun every 24 hours. c) spins once on its axis relative to the Sun every 29.5 days. d) spins once on its axis relative to the Sun every 365 days. e) Never spins on its axis.
C
50. The distance from the Earth to the Sun is: a) 4.3 A.U. b) 4.3 light minutes c) 8.3 light minutes. d) 4.3 light years. e) 8.3 light years.
C
51. During its 3rd quarter phase, the Moon rises at: a) noon. b) 6 PM. c) midnight. d) 6 AM. e) it depends upon the time of the year.
C
55. If you lived on the side of the Moon facing away from the Earth: a) It would always be dark. b) The Sun would rise every 23 hours 56 minutes. c) The Sun would rise every 29.5 days. d) The Sun would rise once per year. e) The Sun would always be above the horizon.
C
59. Planet A and Planet B have the same angular size on the sky. Planet A is known to have a physical diameter of 2 X 104 km. Planet B is known to be 10 times further away from us than Planet A. Therefore: a) Planet B has a diameter of 2 X 103 km. b) Planet B has a diameter of 2 X 104 km. c) Planet B has a diameter of 2 X 105 km. d) Planet B has a diameter of 2 X 1014 km. e) Planet B has a diameter of 2 X 1040 km.
C
14. The distance from the Earth to alpha Centauri is: a) an astronomical unit (A.U.). b) 4.3 astronomical units (4.3 A.U.). c) 8.3 light minutes. d) 4.3 light years. e) 150,000 light years.
D
6. Planet A and Planet B are known to have the same physical size. Planet A has an angular size three times bigger than Planet B. Therefore: a) Planet A is three times further away than Planet B. b) Planet A and Planet B are the same distance from us. c) Planet B is three times further away than Planet A. d) Planet B is a moon of Planet A. e) It is not possible to determine which Planet is larger.
C
64. The constellations on the ecliptic are: a) Always above the horizon for an observer in Johnson City. b) Directly above the Earth's equator. c) The constellations in front of which the Sun passes. d) The constellations visible during the equinoxes. e) The constellations that lie along the imaginary line that runs from the northern horizon to the southern horizon, through the North Celestial Pole and through the zenith.
C
66. If you are only able to see the right half of the Moon illuminated, then: a) The Moon is on the opposite side of the Earth from the Sun. b) The Moon is on the same side of the Earth from the Sun. c) The Moon, the Earth, and the Sun make a right angle, and the Moon is moving away from the Sun. d) The Moon, the Earth, and the Sun make a right angle, and the Moon is moving towards from the Sun. e) The Moon, the Earth, and the Sun make a 45 degree angle, and the Moon is moving away from the Sun.
C
74. The Declination of the Sun is 23.5 degrees: a) Always. b) Never. c) On the Summer Solstice. d) On the Winter Solstice. e) On the Vernal and Autumnal Equinox.
C
75. The Moon rises at midnight and sets at noon when it is in which of the following phases? a) Full. b) First quarter. c) Third quarter. d) None of the above. e) All of the above
C
77. Your little finger held at arm's length covers an angular size of approximately: a) 1 arcsec b) 1 arcmin c) 3600 arcsec d) 3.6 X 106 arcsec e) 24 hours
C
78. For astronauts living in a colony on the near side of the Moon, how often does the Sun rise in the sky? a) every 23 hours 56 minutes. b) every 24 hours. c) every 29.5 days. d) every 365 days. e) The Sun does not rise or set for people living on the Moon; it just stays in the same location in the sky.
C
83. What is the angle between the Sun and the Moon in the sky during a waxing gibbous moon? a) 45 degrees b) 90 degrees c) 120 degrees d) 180 degrees e) it varies from 0 deg to 180 degrees, depending upon the time of year.
C
84. How long is a sidereal month? a) 23 hours 56 minutes b) 2.2 days c) 27.3 days d) 29.5 days e) 4.3 years
C
9. Where would you have to be to see the South Celestial Pole on your horizon? a) About 1 degree away from the south pole, to account for precession. b) The south pole of Earth. c) The Earth's equator. d) The north pole of Earth. e) In Johnson City.
C
92. The Declination of the Sun at the Summer Solstice is: a) -23.5 degrees. b) 0 degrees. c) 23.5 degrees. d) 90 degrees. e) 180 degrees.
C
95. A star at the zenith in Johnson City has a declination of: a) 90 degrees. b) 0 degrees. c) 36 degrees. d) 82 degrees. e) -90 degrees
C
97. A sidereal day is: a) The spin period of the Earth on its axis relative to the Sun. b) 24 hours. c) 23 hours 56 minutes. d) 29.5 days. e) 365 days.
C
98. For an astronaut on the far side of the Moon from the Earth, how often does the Sun rise in the sky? a) Every 23 hours 56 minutes. b) Every 27.3 days. c) Every 29.5 days. d) Every 6 months. e) Never.
C
12. Lunar eclipses occur approximately: a) every 23 hours, 56 minutes. b) every 27.3 days. c) every 29.5 days. d) every six months. e) every six years.
D
13. During a 3rd quarter moon: a) it is possible to see a lunar eclipse. b) the moon rises at noon. c) the Earth's shadow blocks half the face of the moon. d) the moon is visible in the morning. e) the angle between the Sun, Earth, and Moon is 135 degrees.
D
19. The declination of a star is: a) the angle between the star and the horizon. b) the angle between the star and the Celestial North Pole. c) how bright the star appears on the sky. d) the latitude of a person for whom the star is at the zenith. e) the longitude of a person for whom the star is at the zenith.
D
25. A sidereal month is: a) the same as a lunar month. b) twice as long as a lunar month. c) 4 minutes shorter than a lunar month. d) 2.2 days shorter than a lunar month. e) 2.2 days longer than a lunar month.
D
29. A waning gibbous moon is observed: a) When the Sun and the Moon are 90 degrees apart on the sky. b) In the afternoon and early evening. c) A few days after new moon. d) When the angle between the Sun and the Moon, with respect to the Earth, is 135 degrees. e) When the Sun, Moon, and Earth are exactly lined up.
D
35. The Right Ascension is: a) The projection of the Earth's equator on the sky. b) The projection of the Earth's latitude onto the sky. c) The projection of the Earth's longitude onto the sky. d) The celestial coordinate that runs perpendicular to the declination, starting at 0h RA at the position of the Sun during the Vernal Equinox. e) The line on the sky that connects the zenith and the Celestial North Pole.
D
42. A waning crescent moon is observed: a) When the Sun, Earth and the Moon are lined up. b) In the afternoon and early evening. c) A few days after new moon. d) In the morning. e) Directly overhead at midnight.
D
58. The city of Augusta Maine is at 44 degrees North latitude and 72 degrees West longitude. If you were in Augusta (in the year 2002), the location of Polaris in the sky would be: a) at the zenith. b) due north, 72 degrees above the horizon. c) due north, 90 - 72 = 18 degrees above the horizon. d) due north, 44 degrees above the horizon. e) due north, 90 - 44 = 46 degrees above the horizon.
D
68. An Astronomical Unit is: a) The same thing as a Light Year. b) 4.3 light years. c) 60 arcminutes. d) 8.3 light minutes. e) The distance from the Earth to the Moon.
D
72. An arcsecond is: a) the distance light travels in a second. b) 1/60th of a degree. c) 1/360th of a degree. d) 1/3600th of a degree. e) the angle covered by a fist held at arm's length.
D
8. The phases of the moon are caused by: a) The shadow of the Earth on the moon. b) The fact that light is not instantaneous: it takes time for it to reach us from the moon. c) The tilt of the Earth's axis. d) Changes in the relative position of the Sun, Earth, and Moon, as the moon orbits the Earth. e) The fact that the orbit of the moon around the Earth is not perfectly circular.
D
80. Solar eclipses happen: a) Every full moon. b) Every new moon. c) Approximately every sixth full moon. d) Approximately every sixth new moon. e) Approximately every six hundredth new moon.
D
81. The projection of the Earth's latitude onto the sky is the: a) ecliptic. b) meridian. c) right ascension. d) declination. e) celestial equator.
D
82. The time period 23 hours 56 minutes is: a) the time between sunrises on the Moon. b) the time it takes the Sun to appear to orbit the Earth, and return to the same position in the sky. c) the spin period of the Earth on its axis relative to the Sun. d) the time it takes a star to appear to orbit the Earth, and return to the same position in the sky. e) the time between the vernal and autumnal equinoxes.
D
89. For Uranus, how long is a sidereal year? a) 23 hours 56 minutes. b) 365 days. c) 367 days. d) 84 years. e) 26,000 years.
D
96. What do we call the phase of the Moon when we see the left half of the Moon in the sky? a) waxing gibbous. b) first quarter. c) second quarter. d) third quarter. e) waxing crescent.
D
17. If you were an astronaut living in a colony on the far side of the Moon: a) the sky would always be dark: you would never see the Sun. b) the Sun would rise in your sky every 23 hours 56 minutes. c) the Sun would rise in your sky every 24 hours. d) the Earth would rise in your sky every 29.5 days. e) the Sun would rise in your sky every 29.5 days.
E
18. At which phase does the Moon rise at 9 AM? a) waning crescent. b) waning gibbous. c) full moon. d) first quarter. e) waxing crescent.
E
20. On approximately June 21 each year: a) the sun is at the zenith at noon for an observer on the Earth's equator. b) the Earth is closest to the Sun. c) the Sun is on the Celestial Equator. d) the Sun is at the Vernal Equinox. e) the Sun is located 23.5 degrees north of the Celestial Equator.
E
21. The meridian is: a) the projection of the Earth's equator on the sky. b) the path the Sun takes across the sky. c) the plane of the Earth's orbit around the Sun. d) the point on the sky directly above an observer. e) the line (arc) on the sky that runs from horizon to horizon, passing through the zenith and the Celestial North Pole.
E
24. In an astronomical context, the word "precession" means: a) the daily spinning motion of the Earth, producing the apparent motion of the Sun and stars. b) the synchronous rotation of the Moon. c) the motion of the Earth along its orbital path during a year. d) the change of the seasons. e) the slow wobble of the Earth's axis due to the gravitational pull of the Sun and the Moon.
E
27. The line (arc) on the sky that runs from horizon to horizon, through the point directly above you and the Celestial North Pole, is called: a) The zenith. b) The declination. c) The ecliptic. d) The Celestial Equator. e) The meridian.
E
30. The planets are always observed: a) Near Polaris. b) Near the Celestial Equator. c) Near the meridian. d) Near the zenith. e) Near the ecliptic
E
32. For an astronaut on the Moon: a) The Earth rises in the sky every 29.5 days. b) The Earth rises in the sky every 27.3 days. c) The Earth rises in the sky every 24 hours. d) The Earth rises in the sky every 23 hours 56 minutes. e) The Earth never rises or sets in the sky.
E
36. The planet Jupiter: a) Is always located at the same RA and Declination on the sky. b) Is always found on the Celestial Equator. c) Is never visible at midnight. d) Is located in Ursa Minor, the Little Bear (the Little Dipper). e) Is always located near the ecliptic.
E
52. The constellation of Lyra has a declination of about 36 degrees. This means: a) It lies at the Celestial North Pole for an observer in Johnson City. b) It is always 36 degrees above the horizon for an observer in Johnson City. c) It is always 36 degrees to the west of the Prime Meridian. d) It is always at the zenith for an observer in Johnson City. e) It is sometimes at the zenith for an observer in Johnson City.
E
54. The precession of the Earth's axis, due to the gravitational pull of the Moon and the Sun on the Earth's bulge, has a period of: a) 23 hours 56 minutes. b) 24 hours. c) 29.5 days. d) 4.3 years. e) 26,000 years.
E
60. The planet Mars: b) Orbits the Sun in the opposite direction from the Earth. a) Is always located at the same RA and Declination on the sky. c) Has a faster orbital velocity around the Sun, in km/s, than the Earth. d) Is located in the constellation of Ursa Major. e) Mostly drifts eastwards across the sky relative to the stars, but occasionally appears to turn around and go backwards.
E
7. Which of the following observations is NOT possible from the surface of the Earth? a) A third quarter moon is seen at 6 AM. b) Mars is observed on the Celestial Equator. c) A lunar eclipse is seen at full moon. d) The Moon's angular size is less than that of the Sun. e) Venus is seen at midnight from near the equator of the Earth.
E
76. The Declination of the Sun is 0 degrees: a) Always. b) Never. c) On the Summer Solstice. d) On the Winter Solstice. e) On the Vernal and Autumnal Equinox.
E
79. The point on the sky directly above the observer is called the: a) meridian. b) annulus. c) right ascension. d) declination. e) zenith.
E
93. During what phase of the Moon do solar eclipses happen? a) Full Moon. b) First and third quarter Moon. c) Waxing and Waning Gibbous. d) Waxing and Waning Crescent. e) New Moon.
E
94. How long is the period of precession of the Earth's poles? a) 23 hours 56 minutes. b) 365 days. c) 367 days. d) 84 years. e) 26,000 years.
E
