Explorations: Introduction to Astronomy (Arny), 6th Edition

Chapter 2: The Rise of Astronomy

Online Quiz

1
Where on the celestial sphere would you look for the planets?
A)On the celestial equator.
B)On the Galactic equator.
C)In the zodiac (near the ecliptic).
D)At the north celestial pole.
2
What do we call it when a planet moves backward (east to west) through the stars?
A)retrograde motion.
B)the Zodiac.
C)regression.
D)prograde motion.
3
Where will a planet in retrograde motion rise?
A)In the north.
B)In the south
C)In the east (just like everything else in the sky).
D)In the west (the opposite of everything else in the sky).
4
If you see a bright "star" in the sky, how could you tell whether it is a star or a planet?
A)Planets are too dim to be seen without a telescope.
B)Planets are round, stars have five points.
C)Planets always appear right next to the Moon.
D)Look at it several days later--if it's a planet, it will move across the background stars.
5
What is meant by the phrase "angular size"?
A)An object's diameter.
B)How big an object looks, expressed as an angle.
C)The distance around an object.
D)The angle between two circular objects.
6
If you triple your distance from an object, what happens to its angular size?
A)It decreases by one half.
B)It says the same.
C)It reduces to one third what it was.
D)It increases by a factor of nine.
7
Which of the following is a contribution that Eratosthenes made to astronomy?
A)He determined the circumference of the Earth.
B)He discovered epicycles.
C)He discovered his Three Laws (of Planetary Motion).
D)He was the first person known to have pointed a telescope at the sky.
8
Which of the following is a contribution that Kepler made to astronomy?
A)He determined the size of the Earth.
B)He discovered epicycles.
C)He discovered his Three Laws (of Planetary Motion).
D)He discovered four moons (or satellites) of Jupiter.
9
Which of the following is a contribution that Galileo made to astronomy?
A)He determined the size of the Earth.
B)He discovered epicycles.
C)He developed the first successful heliocentric theory.
D)He discovered four moons (or satellites) of Jupiter.
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