Question

The outer planets like Jupiter take at least ________ to complete one orbital revolution around the Earth.

• A. five hundred days
• B. five years
• C. eleven years
• D. twenty years

Answer 1

The correct option is C eleven years

The time for revolution is less if a planet is closer to the Sun. If the planet is far, the path travelled by the planet increases and the time also increases. Between Mars and Jupiter, there is a big asteroid belt. Thus, we can observe that Jupiter is very far; it takes eleven years and eleven months to complete one revolution. All the other outer planets are farther than Jupiter. They take 20 to 170 years to complete one revolution.