'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;

A voice came out of the sky, "You are my beloved Son, in whom I am well pleased."

And when sown, it comes up and grows taller than all the vegetables, and produces large branches, so that the birds of the sky can nest in its shade.”

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

the stars will be falling from the sky,and the celestial powers will be shaken.

He will send out the angels and gather His elect from the four winds, from the end of the earth to the end of the sky.

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

Jesus said, "I am. You will see the Son of Man sitting at the right hand of Power, and coming with the clouds of the sky."