Working for the Moon

In 1969 Buzz Aldrin puts up the retroreflector that allows us to measure the exact distance between Earth and Moon to this day. At the core of the reflector are tripleprisms made from high-tech fused silica from Heraeus. We asked three former employees who worked for Heraeus in the 1960s how this job came about – and how they perceived their involvement in the successful Apollo 11 mission.