The concept of a Space Elevator might seem like science fiction, right? However, what if we told you that a company in Japan ...

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I think you need to do some background reading. I'd suggest looking at the first two or three sections of this page on types of rocket engines. Stop at pressure-fed engines; the details of the ...

Artemis 1 Space Launch System (SLS) moon rocket looks from the Vehicle Assembly Building (VAB) elevator. Credit: Space.com | ...

As for what's affordable... that's all in the eye of the beholder. The world has spent trillions of dollars on space launches already, with very little to show for it mass-wise. A low-g mass driver ...