How long is a year?

Answer:
A year is the amount of time it takes for the Earth to orbit around the Sun once. That takes 365.2429 days or 365 days 5 hours 49 minutes 47 seconds
Similarly other planets have their own years as well. Those closer to the Sun have shorter years, those further from the Sun have longer years. Mercury's year is about 88 Earth days, Neptune's year is over 164 Earth years.
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First answer by ID1269939535. Last edit by RadioFan. Contributor trust: 13 [recommend contributor recommended]. Question popularity: 4 [recommend question].