Skylab

This 1970 photograph shows Skylab's Ultraviolet (UV) Airglow Horizon Photography experiment. It was an astrophysics investigation designed to photograph the twilight airflow and Earth's ozone layer simultaneously in visible and UV wavelengths. These observations provided information on oxygen, nitrogen, and ozone layers in the Earth's atmosphere, and on their variation during night and day cycles. The Marshall Space Flight Center had program management responsibility for the development of Skylab hardware and experiments.