This spectacular image of Saturn, released June 7 by NASA, shows sunlight scattered through the uppermost part of the planet's atmosphere. The sun is eclipsed in this photo, but enough light permeates the atmosphere to reach Cassini's cameras.
The Cassini orbiter snapped this photo Feb. 13, 2010.
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.