Solve the problem.
-The earth, Jupiter, Saturn, and Neptune all revolve around the sun. The earth takes 1 year, Jupiter approximately 12 years, Saturn approximately 30 years, and Neptune approximately 165 years to make a complete revolution. How often will Saturn and Neptune appear in the same direction in the night sky as seen from earth?
[Hint: Find the LCM of 30 and 165]
A) Every 330 years
B) Every 990 years
C) Every 4950 years
D) Every 1650 years

Question

Quizplus · Accepted Answer

The least common multiple (LCM) of Saturn's and Neptune's orbital periods (30 and 165 years, respectively) is 330 years. This means Saturn and Neptune will align in the same direction as seen from Earth every 330 years.

Solve the Problem. -The Earth, Jupiter, Saturn, and Neptune All Revolve Around the Revolve