Images help give a website a nice look. They break up the text and provide some visual interest. Flickr is a great spot to get images. There are a huge number that are covered by the Creative Commons license that can be used. But it is nice to find others.
The Hubble Heritage Image Gallery is another great site. Excellent images of objects in space. You can simply place these photos onto your web page and provide proper attribution. This is one of the great mashups on the Internet. Great photos taken by people can get spread around the Internet in ays that enhance both the user and the photographer.
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