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Japan launches moon lander and X-ray observatory
(spacenews.com)
News and findings about our cosmos.
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I'm pretty sure this has something to do with using the Moon as a jumping-off point to the rest of the solar system. Assuming we can get a functioning colony on the Moon, it will be significantly easier and cheaper to get to Mars and potentially other planets as well. This might just be something I heard from a friend of a friend though, so don't quote me on it.
It'll definitely help develop technology that'll be useful for outer solar system missions.
It doesn't make sense as a stop between the Earth and Mars. You have to slow down to enter orbit, then speed back up to leave it. That's a waste of fuel unless there's a good reason to stop there, like for fueling or assembly, but it makes more sense to do that in Earth orbit using distributed life.