Origin: astronautic (< F astronautique, equiv. to astronaute (astro-astro-+ -naute < Gk naútēs sailor, on the model of aéronauteaeronaut) + -ique-ic) + -al1
as·tro·nau·tics (ās'trə-nô'tĭks) n.
(used with a sing. or pl. verb) The science and technology of space flight. as'tro·nau'tic, as'tro·nau'ti·cal adj., as'tro·nau'ti·cal·ly adv.