Planet that some have proposed terraforming

This crossword clue is for the definition: Planet that some have proposed terraforming.
it’s A 43 letters crossword puzzle definition.
Next time, when searching for online help with your puzzle, try using the search term “Planet that some have proposed terraforming crossword” or “Planet that some have proposed terraforming crossword clue”. The possible answerss for Planet that some have proposed terraforming are listed below.

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Possible Answers: MARS.

Last seen on: Daily Boston Globe Crossword Tuesday, 28 November 2023