astronaut (n)
/ˈæs.trə.nɔːt/
a person who has been trained for travelling in space
astronomy (n)
/əˈstrɒn.ə.mi/
the scientific study of the universe and of objects that exist naturally in space, such as the moon, the sun, planets, and stars
float (v)
/fləʊt/
to stay on the surface of a liquid and not sink
habitable (adj)
/ˈhæb.ɪ.tə.bəl/
providing conditions that are good enough to live in or on
International Space Station (ISS)
galaxy
land (v)
launch (v,n)
meteorite (n)
microgravity (n)
orbit (v,n)
parabolic flight (n)
rocket (n)
satellite (n)
spacecraft (n)
spacesuit (n)
spaceline (n)
spacewalk (n)
telescope (n)
universe (n)