Sky

cielo

(atmosphere above a given point, especially as visible from the surface of the Earth as the place where the sun, moon, stars, and clouds are seen)

cielo

(the abode of God or the gods, etc. — see also heaven)

firmamento

(part of the sky which can be seen from a specific place or at a specific time)

paradiso

(the abode of God or the gods, etc. — see also heaven)