A Year on Other Planets: How Long?

Understanding how long each planet takes to orbit the Sun is key to understanding their yearly lengths.  

Astronomically, a "year" is the time it takes a planet to orbit the Sun once. One year on Earth is 365 days.  

The solar system's year length depends on a planet's distance from the Sun.  

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Mercury and Venus, closer to the Sun, have shorter years due to their smaller orbits.  

However, distant planets like Jupiter and Saturn take longer to orbit, resulting in longer years.  

Two causes explain these orbital periods. First, planets closer to the Sun orbit at shorter distances.  

Second, these closer planets orbit faster due to the Sun's higher gravity.Space exploration and scientific research benefit greatly from planetary year calculations.   

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