Editing Skyhook (structure) (section)

== Similar concepts ==
The capture-ejector rim is a variation that consists of a rim- or ring-shaped structure. Like a rotating skyhook, it would rotate in a direction opposite to its orbital motion, allowing a spacecraft at suborbital velocity to attach to its lower portion and later be flung into orbit from its upper portion. It would be easier for a spacecraft to attach to the lower portion of a capture-ejector rim than to attach to the end of a skyhook (which would only point downwards for a brief period of time).<ref>Macconochie, I. O.; Eldred, C. H.; Martin, J. A. (1983-10-01). "[https://ntrs.nasa.gov/citations/19840007111 Capture-ejector satellites]". NASA Technical Memorandum 85686</ref>