Does anyone know a good place to look or have a direct link to an image of the earth from space? It doesn't have to be very big, I'm going to turn it into an avatar, though of course I could also shrink a larger image. Ideally, I'm hoping for something similar to the space porn Robert posted last year, but I'd like it to be little more North America-centric.
Any pointers, links or if anyone would like to embed their favorite images in a reply, it would be much appreciated. I'd be happy for any help. Thanks.