1) Spacecraft propulsion
Found on
https://www.crosswordclues.com/clue/lithobraking
Lithobraking is a landing technique used by unmanned space vehicles to safely reach the surface of a celestial body while reducing landing speed by impact with the body`s surface. The word was probably coined as a whimsical adaptation of aerobraking, which is the process of slowing a space vehicle by the use of friction against a planet`s atmosp.....
Found on
http://en.wikipedia.org/wiki/Lithobraking
No exact match found.
