service propulsion system

'service propulsion system' can also refer to...


More Like This

Show all results sharing this subject:

  • Astronomy and Astrophysics


Show Summary Details

Quick Reference


A single, large rocket engine of the command and service module (CSM) used for the Apollo space missions that began in the 1960s. It took the form of a cone projecting from the rear of the service module. The SPS was burned for 6 minutes to slow the spacecraft as it neared the Moon, and for 2.5 minutes to power the CSM out of lunar orbit for the return journey. There was no back-up, so any malfunction of the SPS would have stranded the astronauts in permanent lunar orbit.

Subjects: Astronomy and Astrophysics.

Reference entries

Users without a subscription are not able to see the full content. Please, subscribe or login to access all content.