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Could a 1st stage balloon and 2nd stage rocket booster get a spacecraft into orbit?
I was wondering if it is possible for a 1st stage balloon and 2nd stage rocket booster to get a spacecraft into orbit?
It's an interesting idea. A 1st stage balloon could potentially lift the rocket and payload to a high altitude and reduce the amount of fuel needed for the rocket to reach orbit. The 2nd stage rocket booster would then take over and launch the spacecraft into orbit.