Let's say we are on Earth-like planet, but without an athmosphere. There's a rocket on the ground and it's starting now. The rocket accelerates but at a point when it has enough speed it stops accelerating. The rocket has still enough speed to get further away from the planet but not enough to escape the planets gravity field. So the rocket has stopped to accelerate but still has enough speed to get further away from the planet, does an astronaut now feel any kind of inertia? Is he floating in the rocket?