Cadet Competition Written Practice Exam 2025 – The Comprehensive All-in-One Guide to Success!

Question: 1 / 400

How long does it take Neptune to complete an orbit of the Sun?

75 years

100 years

165 years

Neptune takes approximately 165 years to complete one full orbit around the Sun. This long orbital period is due to its great distance from the Sun, as Neptune is the eighth planet in the solar system and is significantly farther out compared to the inner planets. The time taken for a planet to orbit the Sun is influenced by its distance from the Sun, following Kepler's laws of planetary motion, which state that the farther a planet is from the Sun, the longer it takes to complete its orbit.

The other options do not accurately reflect the actual orbital period of Neptune. For instance, while 75 years is shorter than its actual orbital period, 100 years and 200 years extend beyond its true time frame, making 165 years the most accurate choice in this context.

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200 years

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