'Sky' in the Bible

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

yet when it is sown, grows up, and becomes greater than all the herbs, and puts out great branches, so that the birds of the sky can lodge under its shadow."

the stars will be falling from the sky, and the powers that are in the heavens will be shaken.

Then he will send out his angels, and will gather together his chosen ones from the four winds, from the ends of the earth to the ends of the sky.

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."