English: STS07-32-1702 (22 June 1983) --- The Earth-orbiting space shuttle Challenger beyond the Earth's horizon was captured by a 70mm camera onboard the unmanned, free-flying Shuttle Pallet Satellite (SPAS-01) during the busy flight day 5 of the STS-7 mission. Visible in the cargo bay are the protective cradles for the now-vacated Telesat Anik C-2 and Palapa B communications satellites, the pallet for the NASA Office of Space and Terrestrial Applications (OSTA-02), the Remote Manipulator System (RMS) and the KU-Band antenna. The STS-7 crew with the RMS later retrieved the SPAS and returned it to a stowed position in the cargo bay for return to Earth. Photo credit: NASA or National Aeronautics and Space Administration