Super-TIGER stands for Trans-Iron Galactic Element Recorder, and it was looking for rare, heavier-than-iron elements coming toward Earth. The planet is subject to a constant flux of high-energy cosmic rays from around the galaxy, and they can be harmful to astronauts and life on Earth. Scientists want to know where these cosmic rays are coming from and how they achieve such high energies, but they are difficult to study because Earth's atmosphere mostly blocks them. They might come from distant exploding stars, or maybe other cosmic sources. Super-TIGER, which detected at least 50 million cosmic rays, will help scientists figure this out.