Does an astronaut feel the sensation of movement in space? Can high speeds hurt their body in a vacuum?
Like let's say they're riding in a spaceship that's going 10 miles per hour, versus a spaceship that's going 1 million miles per hour. Does it feel the same or will the astronaut be disintegrated by the speed?

If the spaceship is going a million miles per hour, can they still just easily maneuver around the ship by grabbing handles?