Multiple choice general knowledge science & technology What does SSTO stand for? Space shuttle Transport Orbit Space shuttle Transport Organization Single stage to orbit Space shuttle Transit orbit Reveal answer Fill a bubble to check yourself C Correct answer Explanation SSTO stands for Single-Stage-To-Orbit, referring to a spacecraft that reaches orbit from a planetary surface without discarding any hardware (no stages). The other options incorrectly link the acronym to the Space Shuttle or transport organizations.