Man... that's out of this world big. (I've probably heard of larger images in size, but none that intrigue me as much as what you just spoke for.)
plus... even if/when you do download the thing, I'm not sure that Windows Picture Viewer is going to like opening up a 500+ MB file. Do you have a metric/ft/pixels converter handy? I'm sure it is easy enough to find with
"pixel foot converter", but... I can't even comprehend how large in diameter it must be (say: wider than my village block?)