Etymology

Aldrin cycler

Today it means: A spacecraft which cycles between Earth and Mars, in its own orbit which intercepts both their orbits at times when the planets are at those points in their orbits; which allows transport from Earth to Mars, or vice versa. Full definition →

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The story

From Aldrin + cycler. After Buzz Aldrin, who developed the concept and its mathematical basis. From being a cycler, a space vehicle which cycles between intercepts of two celestial bodies in their own orbits, with little or no orbital adjustments needed, on as close to pure ballistics as practicable.

Etymology from Wiktionary, CC BY-SA 4.0.