If you have heard of FITS Liberator, it is now available for use with Adobe Photoshop CS4. If you haven't heard of it, FITS Liberator is a Photoshop plugin which allows you to manipulate raw images from, for example, the Space Telescope and create your own colour images with them. It is also a great way to practice image proccessing for your own images.
I found this while I was stumbling. It shows the dusk and dawn lines on earth. You can see it at: http://www.opentopia.com/sunlightmaphemi.html I also did a post at my blog: http://hotastronomy.com/2009/05/10/a-hemispherical-map-of-world-sunlight/
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