You know that there is gravity in space right anons? That it diminishes with (approximately) an inverse square to the distance, but it extends out forever from every body. The only reason why objects in orbit don't have apparent gravity is that their orbital velocity means they are falling forward at exactly the same rate as the planet is curving away from them. That said, this is still a stupid depiction because it means that they are already strongly accelerating out of orbit as the party is trying to board. Yet somehow they are still that close to the other ships.