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Which planet takes the longest to orbit the Sun?
Quick Answer
Neptune takes the longest to complete one orbit of the Sun, at about 165 Earth years. It has not yet completed a full year since it was discovered in 1846.
The Full Story
Neptune is the outermost recognized planet, so it travels the widest orbit and takes the longest to finish one circuit around the Sun. Its orbital period is about 164.8 Earth years. Because of that, Neptune has completed only one full orbit since its discovery in 1846, when it was found through mathematical prediction. This makes Neptune’s year one of the most striking examples of the scale of the Solar System.
Key Facts
1.Neptune’s year is about 164.8 Earth years
2.Discovered in 1846
3.One Neptunian year is longer than a human lifetime
YouTube Angle
Suggested video title for this topic:
"The planet where one year lasts longer than 160 Earth years!"
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