system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does the space shuttle roll after launch?
gpt
To keep the astronauts under positive g while headed up to orbit. 


The shuttle doesn't go just straight up, it curves out over the Atlantic. When they make the transition from up to over, they roll the shuttle on its back so the crew doesn't black out from g-loc.