The Canon 60Da DSLR is specially designed to take photos of stars. Compared with other DSLRs, the camera's infrared filter permits three times the red hydrogen-alpha wavelengths emitted by celestial bodies to reach the image sensor. Canon EOS 60Da:$1,500
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.