How long does Mars take to complete its orbit around the Sun compared to Earth?
Answer
Closer to 687 Earth days
The difference in orbital periods between Earth and Mars is a fundamental driver of mission timing complexities. Earth completes one full orbit around the Sun in approximately 365 days. In contrast, Mars travels much slower in its outer orbit, requiring significantly more time to complete its circuit, specifically closer to 687 Earth days. This disparity in orbital speeds means the relative positions of the two planets are in constant flux, necessitating precise timing based on the synodic period to ensure the launch meets the target planet in space.
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