Image: NASA

Image: NASA

Image: NASA

The ALFMED , short for the "Apollo Light Flash Moving Emulsion Detector" may go down as one of NASA's weirdest looking physics experiments. Kind of like an Apollo-era Daft Punk.Scientists built it after astronauts on their way to the moon reported seeing mysterious flashes of light , even when their eyes were closed. The experiment was a way to identify these mysterious sprites. You can hear the crew of Apollo 17 using it on this week's podcast Inside the contraption , a moving photographic sheet recorded the direction, intensity and time of every cosmic ray particle aimed at the wearer's eyes.The Ray-Bans are a nice touch.