Here's why:
* Orbital Distance: Neptune is the farthest planet from the sun, with an average orbital distance of about 30 astronomical units (AU). One AU is the distance between the Earth and the Sun.
* Elliptical Orbit: All planets have elliptical orbits, but Neptune's orbit is more elongated than most, meaning its distance from the sun varies slightly throughout its revolution.
* Longer Revolution: Because Neptune is so far away and has a larger orbital path, it takes much longer to complete one revolution around the sun. Its orbital period is about 165 Earth years.
While planets like Jupiter and Saturn are larger than Neptune, their shorter orbital distances mean they travel less distance during their revolution.
