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Wouldn't it be interesting to have a Google Earth-like products of other planets (due to spectacular advances in imaging, of course :-) ) long before we ever have the means to travel there?

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That already exists! There is a product by NASA that allows you to do that, I don't remember the name (you can see the moon, mars, mercury, etc).

This one: http://worldwind.arc.nasa.gov/

Enjoy! It's really amazing

Great - thanks!

There's also Microsoft's WorldWide Telescope (Windows only): http://www.worldwidetelescope.org/Home.aspx

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