4 Photos - Jan 11, 2012
Photo: A photo of the balloon that took the payload into space over Antarctica. You can get an idea of its size by looking at the equipment on the ground, but to really understand, you should know that two 747s could fit inside the balloon with ease.Photo: A closeup of the payload the balloon carried.Photo: More detail on the payload. The instrumentation looked for high-energy electrons from cosmic rays -- particles that tell scientists about nearby dying stars.Photo: