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Re: Black Holes And Spaceships

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Posted by fred on January 29, 1998 02:29:20 UTC

: : : :Suppose I choose a large black hole. One large enough so that my space ship won't be torn apart by the gravitational gradient. : : : :Suppose my spaceship has an engine powerfull enough to provide some velocity away from the object in the centre of the black hole. Not very difficult, as long as the black hole is a big one. : : : :Then as long as my engine is stocked with fuel, I can escape the black hole. Can't I. : : : :My question is, using a fusion engine, whats the smallest black hole I could cross the event horizon and survive to tell the tale??

: : No, you would not be able to escape the : : singularity once you cross the event horizon. : : Inside the event horizon, light rays are curved : : inward towards the singularity. No matter how : : powerful your rockets are, you must end up spiraling : : into the singularity. All matter within the : : event horizon must follow a path that leads to the : : singularity. : :Not true. You are talking about particles that can not generate thrust and acceleration. My spaceship can.

Or to put it another way, as long as I can counteract the effect of gravity and maintain a forward velocity, no matter how small, I can eventually escape. I do not need to attain escape velocity if I have an engine that will keep burning long enough.

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