astronautics

n. science of space travel

Astronautics, or Astronautical Engineering, is the branch of engineering that deals with machines designed to exit or work entirely beyond the Earth's atmosphere. In other words, it is the science and technology of space flight.
See more at Wikipedia.org...

Noun
1. the theory and practice of navigation through air or space
(synonym) aeronautics
(hypernym) physics, physical science, natural philosophy
(hyponym) avionics
(class) rigid

Art and science of designing, building, and operating manned or unmanned space objects. (AIA1)

Synonyms and related words:
aeronautics, aerospace medicine, aerospace research, aerospace science, aerospace technology, air service, airline, aviation, ballooning, bioastronautics, blind flying, cloud-seeding, commercial aviation, contact flying, cruising, escape velocity, flight, flying, general aviation, gliding, grand tour, interplanetary travel, pilotage, rocketry, sailing, sailplaning, science fiction, soaring, space flight, space medicine, space travel, space walk, step flight, trip to Mars, winging