An astronaut floating in space.
An example of an astronaut is Neil Armstrong, the man who walked on the moon.
Origin of astronautfrom French astronaute: see astro- and aeronaut
Origin of astronautastro- Greek nautēs sailor ( from naus ship ; see nāu- in Indo-European roots.)
Coined from Ancient Greek ἄστρον (ástron, “star”) and ναύτης (naútēs, “sailor”).