@Twoinchdestroya @ColesterolCoasterToaster @PNS @freemayonnaise Time passes slower for objects in motion and objects in non-inertial frames of reference (observers who are being accelerated either by gravity or an applied thrust), relative to stationary observers in inertial frames of reference. Moving objects are also length contracted from the perspective of observers in inertial frames.

For observers in motion and not in an inertial frame, they perceive the whole world as moving, and so time for the outside world is slowed while time moves normally for them, and the outside world also contracts in the direction of motion. But when experiencing any acceleration, time in the outside world appears to speed up relative to them.