'Heavens' in the Bible

Now it happened in the thirtieth year, in the fourth [month], in the fifth [day] of the month, as I was among the captives by the river Chebar, that the heavens were opened, and I saw visions of God.

When I shall extinguish you, I will cover the heavens, and make its stars dark; I will cover the sun with a cloud, and the moon shall not give its light.