After a year of tests, a hyperspectral spy satellite is being called into service this weekend as a military reconnaissance tool, the Air Force says.
The Tactical Satellite-3, or TacSat-3, uses hyperspectral imaging to identify objects of interest in the ground and supply coordinates for them. Within 10 minutes of passing overhead, laptop-sized ground terminals can mark points of interest for combat troops, as the Register reports.
Editor Doug Cantor demonstrates how a drill and a few zip ties can transform a stack of old floppies into a handy box for holding those even older data-recording devices: your pens. For more detailed instructions, head to the original Instructable for this project, courtesy of completegeek.
Satisfy your scientific curiosity and your craving for some Frosted Flakes. Editor Mike Haney shows you how to use an old cereal box and a CD to build a device that reveals the hidden rainbow inside any light source. Find more examples of DIY spectrometers over at Wikipedia.