Astronomy college course/Apparent regrograde motion/Quiz01/Original version of this quiz

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1

____ motion is in the usual direction, and _______ is motion that has temporarily reversed itself.

direct; elliptical
elliptical; retrograde
direct; retrograde
indirect; direct
retrograde; direct

2

Under what conditions would a planet not seem to rise in the east and set in the west?

if the planet is in retrograde motion
if the observer is near the north or south poles
if the planet is in direct motion
if the planet is in elliptical motion
if the observer is below the equator

3

When the faster moving Earth overtakes a slower planet outside Earth's orbit

retrograde motion occurs
two of these are true
all of these are true
tidal forces can be observed on Earth
tidal forces can be observed on the planet

4

Which planet spends more days in a given retrograde?

Saturn
It depends on the season
They are all equal
Earth
Mars

5

Which planet has more days between two consecutive retrogrades?

Earth
Mars
It depends on the season
They are all equal
Saturn

6

A planet that is very, very far from the Sun would be in retrograde for approximately ___ months.

1
6
24
12
3

7

If a planet that is very, very far from the Sun begins a retrograde, how many months must pass before it begins the next retrograde?

12
1
24
6
3

8

Planet comes from the Greek word for 'wanderer'.

true
false

9

We know that Galileo saw Neptune, but is not credited with its discovery because

he never published his drawing
none of these are true
he thought it was a moon of Saturn
it was in a transition between retrograde and direct motion
it was too faint to be worth drawing