"So that is the one that is what the sun does. Hope no one ever does get it started because if they do we is dead and the earth will be another sun"
Utter nonsense. Every hydrogen bomb that's ever been ignited involved a fusion reaction, and the earth hasn't been swallowed up yet. The earth does not have enough mass for gravity to create the temperatures and pressures necessary to sustain a fusion reaction, plus the earth is already mostly heavy elements that won't sustain a fusion reaction. The sun is mostly hydrogen, and is busily making heavier elements in the fusion reaction at its core.
Fusion reactions require extreme pressure and temperatures, like you find in the interior of the sun, to be sustained. Without both the temperature and pressure to force atoms together, the reaction will simply stop. That's why no one has been able to build a workable fusion power source yet...it takes more energy to ignite and sustain the reaction than we've been able to recover out of it. Some one will eventually solve that problem, but right now its still being worked on.
In simplistic terms, a hydrogen bomb uses a chemical explosive to compress fissionable material to critical mass, which then ignites a fission reaction, which it turn heats and compresses a sphere of deuterium (heavy hydrogen) enough to force the hydrogen atoms to fuse into helium, creating a fusion reaction.
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Today's Featured Article - Talk of the Town: Diesel Vs. Gasoline - by Staff. Another neat discussion from the Tractor Talk Discussion Forum. The discussion started out with the following post: " I am in the market for an older tractor (to be read... cheap). I have been told a diesel holds up better than a gasoline engine as far a wear, tear, neglect and abuse. Since I am looking at older tractors that have probably been through it all, is it better to buy diesel? I do expect to have to do a good bit of work on
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