One only has to look up at the sky to see why.

He looked up at the clear night sky for a moment.

I turned away and looked up at the blue sky.

He sat looking at the sky for a long time.

He left by the front door and I looked at the sky through the window.

The big man stood for a moment and looked up at the deep blue sky.

She went to the window and looked at the sky.

I like to look at the sky before the sun comes up.

He looked up at the sky and then out to his fish.

I looked out the open car window at the sky.