BigBoob-If they turned on their engines to break, they would turn like spinning tops at that speed.<br /><br />Me:<br /><br />Ok, you must be assuming they are going to fire with everything they have all at once to slow the thing down but that's not how it works, to the best of my knowledge. It's like driving on ice, seeing a stop sign ahead and slamming your brakes on. You will definitely spin like a top if you do that and that happens here on earth, *and* it happens no matter where the major portion of the mass is. In the case of a car, that's typically the front but even my old VW Beetle would do it if I didn't have control. <br /><br />Now say you're driving on ice and you see a stop sign and you slowly begin to apply the brakes. You will remain relatively "straight" and if you do it well enough you will stop before you run the stop sign. If you had the time, distance and ability to spin your car 180 under control, you could duplicate what goes on in space.<br /><br />That last episode is what's going on in space. Only in this case they already know that the stop sign is coming years in advance and can turn the craft around and begin "braking" at their leisure. This doesn't even take into account the effects of gyroscopes which would keep the craft in control even more so and prevent some of Newton's laws from coming into play. <br /><br />The thing is, the "spinning like a top" would happen in the vacuum of space no matter what speed it is moving because it's a frictionless environment. But with good planning they can control it and prepare for all that you describe and then some. Afterall, that spinning isn't a permanent state unless they run out of fuel, or something else equally disastrous, and they're not likely going to try to do everything at the last moment without a backup plan. They wouldn't be engineers if they did that..they'd be, well, you.<br /><br />Now, if you'd like to prove me wrong, use a metaphor that accurately describes the situation because I will pic