Sun's path June to December (Photo)

I was just explaining to my kid how you can tell your latitude from the sun's angle at noon, if you know the day. This picture solidified that idea.

Such an elegant solution in the day of the never decreasing memory card sizes and megapixels.

Wait a minute... how do you scan an undeveloped piece of photographic paper? If you read the instructions it says to put the paper on a scanner in a dark room and just scan away. Doesn't the scanner immediately blow out the image?

http://www.pinholephotography.org/Solargraph%20instructions....

I'm surprised that he is able to scan the latent image from the exposed photographic paper without developing it. Especially since the scanner will further expose the paper so it would be useless afterwards... Maybe this is just working because the paper gets way overexposed and that will make the latent image actually show without development. Does anybody know what's going on there?

Wow, Google has a lot of good examples: http://www.google.com/images?&q=Solargraph

I was expection a metaphor about Sun Microsystems' decline.

Was I the only one expecting the picture to involve Larry Ellison and a wood-chipper?

This appeared on Makezine last month. And it got me thinking: what would be the best way to do this with a webcam?

pixel = (added pixel value of all frames) / total frames?

It seems a futuristic skyscraper behind an old fashion house