The set of photographs that come with your iPad are great. However, you might want something more. Here’s one I put together. It is, obviously, inspired by The Hitchhikers Guide To The Galaxy. To get it on you iOS device, just tap the Don’t Panic link below and and tap-and-hold when the large image appears. Then just select Save Image.
That image is courtesy of Nasa. You can find the original here: M82 – Galaxy with a Supergalactic Wind.
By the way,
When the original iPhone came out in the UK almost 3 years ago, I put together a collection of alternative planets, just incase you got bored of the western hemisphere of Earth. you can find that here. (Yes, alternative view of the Earth is included.)