The institute is also active in space research. For example, in 1990 PSI engineers built the detector of the EUVITA telescope for the Russian satellite Spectrum X-G, and later also supplied NASA and ESA with detectors to analyse radiation in space. In 1992, physicists used accelerator mass spectrometry and radiocarbon methods to determine the age of Ötzi, the mummy found in a glacier in the Ötztal Alps a year earlier, from small samples of just a few milligrams of bone, tissue and grass. They were analysed at the TANDEM accelerator on the Hönggerberg near Zurich, which at the time was jointly operated by ETH Zurich and PSI.