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11 votes

Could we make space roads? Like a space elevator between planets?

The trouble you're going to run into there is that the planets spin and move, which makes it hard to have a road or whatever in place. It's a little like trying to build a tower to reach an airplane ...
Darth Pseudonym's user avatar
5 votes

Solar Reflective Plasma Drive

Sounds a bit like a solar thermal rocket. Here's a diagram of one from page 49 of Solar Rocket System Concept Analysis. It would use a pair of parabolic reflectors to use sunlight to heat propellant. ...
Starfish Prime's user avatar

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