Deep Space Drones

The $600 million Kepler space observatory was launched March 7, 2009 to find Earth sized planets orbiting stars, known as exoplanets. It has been surveying a part of our Milky Way galaxy for planets in or near the habitable zone, where water could exist in liquid form, and be able to support life. Now, a new way to find previously hidden alien worlds using it's data has been found.