| − | The '''sky''' is the visible portion of [[Earth]]'s upper [[atmosphere]] as seen from the ground. If there were no atmosphere stars could be seen even during the day. [Christian]]s believe the sky is where [[angel]]s live. | + | The '''sky''' is the visible portion of [[Earth]]'s upper [[atmosphere]] as seen from the ground. If there were no atmosphere stars could be seen even during the day. [[Christian]]s believe the sky is where [[angel]]s live. |