Megastructures Alderson Disk 3

Part of the "Megastructures: The Visual Encyclopedia" book project, on sale now at http://www.neilblevins.com/projects/megastructures/megastructures.htm

The Alderson Disk is a giant platter (like a Compact Disc) with a thickness of several thousand km and an outer radius roughly equivalent to the orbit of Mars or Jupiter. The sun is located in the hole at the center of the disc.