'Sky' in the Bible

and immediately on His coming up out of the water He saw an opening in the sky, and the Spirit like a dove coming down to Him;

and a voice came from the sky, saying, "Thou art My Son dearly loved: in Thee is My delight."

The Pharisees followed Him and began to dispute with Him, asking Him for a sign in the sky, to make trial of Him.

Then He will send forth the angels and gather together His chosen People from north, south, east and west, from the remotest parts of the earth and the sky.

Earth and sky will pass away, but it is certain that my words will not pass away.

"I am," replied Jesus, "and you and others will see the Son of Man sitting at the right hand of the divine Power, and coming amid the clouds of the sky."