In Wolf Willow, Wallace Stegner has some answers:
Over the segmented circle of earth is domed the biggest sky anywhere, which on days like this sheds down on range and wheat and summer fallow a light to set a painter wild, a light pure, glareless, and transparent. The horizon a dozen miles away is as clean a line as the nearest fence. ...
The drama of this landscape is in the sky, pouring with light and always moving. The earth is passive. And yet the beauty I am struck by, both as present fact and as revived memory, is a fusion: this sky would not be so spectacular without this earth to change and glow and darken under it.