What about the moon? Surely not…
Well, ultimately space elevators are the most energy efficient way to escape Earth’s gravity well. And once we have one of those, mind as well build a mass driver at the top so rockets don’t have to carry so much of their own mass. Then we can build a laser-based photonic sail on the other end to decelerate the cars and make them even lighter/faster, and then build track at the bottom…
Train.
What about interstellar travel?
Well, ultimately wormholes are way more efficient than any subluminal travel once the infrastructure to build them is in place: https://www.orionsarm.com/eg-article/48545a0f6352a
So we control traffic on each side carefully. In fact, we could just suspend a really strong wire on either end…
Yep. Train.
I mean, currently both space elevators and wormholes (as transportation) seem physically impossible.
If we’re not sticking to the realm of our current understanding of physics, then that opens the doors for techbros too, because we’re in the realm of speculative fiction and things can be however we say they are.
They’re physically possible, just massive engineering challenges. Read Orion’s Arm’s overview, it’s largely based on current known physics.
And once we have one of those, mind as well build a mass driver at the top so rockets don’t have to carry so much of their own mass.
You wouldn’t even need a mass driver. You have to build your space elevator so that it’s center of mass is where you want it to orbit. Logically, this needs to be at geostationary orbit so that the end point on the ground stays in the same spot. That means you can extend the other end of the elevator to twice geostationary orbit. Lift a mass from the ground to the far end of the elevator and just let it go. It will be flung away out of earth orbit because it’ll already be moving faster that orbital velocity at that height. You’re limited in the direction you can fling it because it will be flung off by the Earth’s rotation, but you don’t necessarily need a mass driver.
