* Year Definition: A year is the time it takes for a planet to complete one full orbit around its star (the Sun in our case).
* Orbital Periods: The length of a year varies significantly between planets because their orbits are different distances and speeds.
Here are some approximate year lengths for planets in our solar system:
* Mercury: 88 Earth days
* Venus: 225 Earth days
* Earth: 365.25 Earth days
* Mars: 687 Earth days
Let me know if you have any other questions about planets or space!
