____ motion is in the usual direction, and _______ is motion that has temporarily reversed itself.
Under what conditions would a planet not seem to rise in the east and set in the west?
When the faster moving Earth overtakes a slower planet outside Earth's orbit
Which planet spends more days in a given retrograde?
Which planet has more days between two consecutive retrogrades?
A planet that is very, very far from the Sun would be in retrograde for approximately ___ months.
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?
Planet comes from the Greek word for 'wanderer'.
We know that Galileo saw Neptune, but is not credited with its discovery because