'Sky' in the Bible

And as they were gazing intently into the sky while He was going, behold, two men in white clothing stood beside them.

They also said, “Men of Galilee, why do you stand looking into the sky? This Jesus, who has been taken up from you into heaven, will come in just the same way as you have watched Him go into heaven.”

‘And I will grant wonders in the sky aboveAnd signs on the earth below,Blood, and fire, and vapor of smoke.

and he *saw the sky opened up, and an object like a great sheet coming down, lowered by four corners to the ground,

This happened three times, and immediately the object was taken up into the sky.

“I was in the city of Joppa praying; and in a trance I saw a vision, an object coming down like a great sheet lowered by four corners from the sky; and it came right down to me,

This happened three times, and everything was drawn back up into the sky.