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...220x124px | right | alt= This is an image that shows StarTram launching a rocket. | StarTram launching a rocket]] ...

...] is theorized to be significantly less expensive than spaceflight using [[rocket engine]]s. These can be either rotating tethers, or [[Skyhook (structure)|non-rotating tethers]], that capture an arriving spacecraft and then release it ...

...''' {{math|{{!}}''x''{{!}}}} of a [[real number]] {{mvar|x}} is the [[non-negative]] value of {{mvar|x}} without regard to its [[sign (mathemati ...h an atmosphere, and it requires less fuel than does the direct use of a [[rocket engine]]. ...

...ed into space without changes in economics (like hypothetical [[non-rocket spacelaunch]] or usage of extraterrestrial resources) — many hundreds of metric tons fo ...