"Dark energy comprises about 70 percent of the universe and is responsible for the surprisingly accelerating expansion of the universe, yet it is one of the biggest mysteries facing science today...If approved, the Dark Energy Survey would measure the history of the expansion rate of the universe more precisely than ever before, using the largest camera ever built with Charge Coupled Devices (CCD). The 500 megapixel Dark Energy Camera would be placed on an existing 4-meter telescope located in north-central Chile at the National Optical Astronomy Observatory's Cerro Tololo Inter-American Observatory."As far as I can tell, the project has not been approved yet and won't be put in place until 2012 even if it is funded. However, it will generate over 100 terabytes of data for the appropriate research, once created. But 500 megapixels? Wow! A real use for the $15K 12GB CF card. :)