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Why does a planet far from the Sun take longer to complete one year?

AIts orbit around the Sun is smaller
BIt spins much faster on its axis
CIt has a much smaller mass
DIts orbit around the Sun is bigger
Answer & Solution
Correct answer: D. Its orbit around the Sun is bigger
1. One year is the time a planet takes to travel once around the Sun. 2. A planet further out has a much bigger path to travel. 3. Covering a bigger path takes more time, so its year is longer. 4. Spinning speed sets the length of a day, not the length of a year. _Source: Siyavula Natural Sciences Grade 7 (CC BY 4.0), Earth's revolution_
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