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No.7621038 ViewReplyReportDelete
How do we send humans on Mars?

Getting to LEO takes ~10k dV. Getting to Mars Orbit takes another ~7k dV. Returning from Mars Orbit to Earth is another 7k dV.
Landing on Mars requires another 4k dV. Taking off from Mars into orbit is another 4k dV. Just the Mars Lander alone would need 8k dV, that's almost the size and weight of a vehicle launching from Earth into LEO.

Right now we're struggling to send more than a few dozen tons of stuff into Earth Orbit (10k dV), how are we ever going to be able to do this?