From the U.S. National Park Service and Yosemite Conservancy comes this great short film about the skies above Yosemite NP. The distance to major cities and thus relative absence of light pollution makes for phantastic night skies. Astronomers and (time lapse) photographer and others take advantage of these conditions:[youtube http://www.youtube.com/watch?v=ZhgR3zVfo-0]
For best enjoyment make sure to crank up the resolution in YouTube and switch to full-screen playback.
The film is part of a series (Yosemite Nature Notes) and I have a feeling that subscribing to their YouTube channel oughta be worthwhile: http://www.youtube.com/user/yosemitenationalpark.