![globe_west](https://www.astronomy.com/wp-content/uploads/sites/2/2023/02/globe_west.jpg)
NASA
The short answer is that even though other planets don’t have oceans like Earth, we can still calculate the level an ocean would have and use that as a baseline.
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The short answer is that even though other planets don’t have oceans like Earth, we can still calculate the level an ocean would have and use that as a baseline.