LizR wrote:I assume it was outside the event horizon, or it would have been spaghetti anyway. However, rotating holes also have an "ergosphere" in which literally nothing can stand still (light orbits the hole inside the ergosphere). But even outside that, the stresses on a solid object with a significant time dilation disparity along its length would be impossible - the old irresistible force meeting an immovable object, except that in Relativity theory there are no immovable objects. The simplest way to think about it is that the orbital velocity of one end of the ship, closer to the hole, would be faster than the orbital velocity of the far end. On the Moon, with its sides at different distances from Earth, this difference has caused tidal drag that has stopped it rotating relative to Earth. Near a black hole those forces are billions of times stronger, so even a non-rotating hole would shred the spaceship - a rotating one (the only sort thought to actually exist) would have turned it into an X-ray hot disc. See Larry Niven's story "Neutron star" for a graphic description - but drastically toned down - of what it would be like aboard the spaceship:
The dictaphone was fifty feet below, utterly unreachable. If I had anything more to say to General Products, I'd have to say it in person. Maybe I'd get the chance. Because I knew what force was trying to tear the ship apart.
It was the tide.
The motor was off, and I was at the ship's midpoint. My spread-eagled position was getting uncomfortable. It was four minutes to perihelion.
Something creaked in the cabin below me. I couldn't see what it was, but I could clearly see a red point glaring among blue radial lines, like a lantern at the bottom of a well. To the sides, between the fusion tube and the tanks and other equipment, the blue stars glared at me with a light that was almost violet. I was afraid to look too long. I actually thought they might blind me.
There must have been hundreds of gravities in the cabin. I could even feel the pressure change. The air was thin at this height, one hundred and fifty feet above the control room.
And now, almost suddenly, the red dot was more than a dot. My time was up. A red disk leapt up at me; the ship swung around me; I gasped and shut my eyes tight.
That gives some idea of what life would really be like aboard a huge spacecraft. In particular, the hull would have to be made of unobtainium (like Niven's General Products hull in the story) to withstand the forces.
However, kudos to them for having made the attempt. I was only being pedantic, pointing out that in reality things wouldn't have worked as shown, and a decent SF writer would have looked into the whole thing in more detail (but then, even Niven got the physics of "Ringworld" wrong).[/quote]
We do have to allow a little artistic licence , I mean the Tardis is an impossibility anyway!! like you say , kudos for the attempt. I always thought that with Black Holes, sitting just beyond the event horizon was just possible as you were avoiding the point of no return ergo "Event Horizon" ? Anyway Tomato tomarto, you get my drift,? It's fun to speculate, yes? My point still stands though with New Who, they should try and educate the audience with more science, but I guess that would require some effort as in "research"?