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5 years ...no that's way off... It took the Mars Pheonix lander about 10 months to reach mars back in May 2008 and it takes light (or radio communication) about 10 minutes to travel that distance. It depends if you are using a constant boost ship or not. With a constant boost of 1 gravity, it would take about 2-3 days (you boost to the half way point then flip over and boost the opposite way to slow down). With a constant boost of 1/10 gravity it would take about 7-8 days. With a constant boost of 1/100 gravity it would take about 23 days. With a constant boost of 1/1000 gravity it would take about 73 days. This is the kind of boost you can achieve with "light sails" that use the "pressure" of the light coming from the sun. We are assuming that mars is about midway from the farthest it can be from the earth to the closest it can be from the earth. If mars is farther away it will take a little more and if mars is closer it will take a little less. Also it is interesting that light sail ships take only a little longer to reach Mars than it took the Mayflower to reach America. It took the Mayflower 66 days to reach America.

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16y ago

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