The Sky (no land or water)

Brief

Many of the most important features of photography rely on the sky for light, atmosphere and mood. For this contest, I want you to concentrate on the sky itself. Your images should only have the sky in them; no water or land. As this is open to your own interpretation, your images can include either the sun or the moon and of course, clouds. Show me how beautiful the sky can be as a stand-alone wonder of nature.