This page is designed to simplify the access to satelite pictures avaliable on the internet. It is a collection of different agencies providing the public with satelite images of different geological and atmospheric data. It includes also a site where you find some old pictures taken from spy-satelites. If you have dreamed to be a spy you might try the following page. It contains declassified satelite pictures from a defense spy-satelite.
Some sites are a lot more mature than others.
Alaska's is barely worth talking about. By contrast, the Snow and Ice Pictures at Boulder are easily to obtain.