This question may sound ignorant. When it comes to physics, I guess you could say I'm physically challenged. Still, I would appreciate any and all help given. Assume a future, highly advanced human civilization built a spaceship at the edge of the galaxy. The ship slowly started accelerating, and did not cease until it reached 99.99 percent the speed of light. It then orbited around the galaxy, thus making a complete trip around roughly once every 300,000 years. At this distance, and at this speed, would they be able to notice, and/or survive the centripetal forces?