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SinJin · **Dark Energy -** 06-20-2006, 07:43 PM

I've been reading about dark energy. From what I've gathered, this dark energy has a negative pressure which produces the opposite effect of gravity, in turn causing the universe to increase it's rate of expansion. It permeates all of space, and I was wondering if in theory dark energy could be used to propell a space craft, similar to how a cable car is propelled by the electricity in the cable it's attached to. If so, then we could be traveling for free with the only energy we use being empty space! Any thoughts on this?

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SinJin Blue Belt Status: Offline Posts: 120 Thanks Given: 0 Thanked 1 Time in 1 Post Join Date: Jun 2005 Rep Power: 15	Dark Energy - 06-20-2006, 07:43 PM I've been reading about dark energy. From what I've gathered, this dark energy has a negative pressure which produces the opposite effect of gravity, in turn causing the universe to increase it's rate of expansion. It permeates all of space, and I was wondering if in theory dark energy could be used to propell a space craft, similar to how a cable car is propelled by the electricity in the cable it's attached to. If so, then we could be traveling for free with the only energy we use being empty space! Any thoughts on this?