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China's 'artificial sun' shatters nuclear fusion record by generating steady loop of plasma for 1,000 seconds (www.livescience.com)

submitted 1 day ago by [email protected] to c/[email protected]

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[–] [email protected] 4 points 5 hours ago (1 children)

Yeah that is not how that works

The sun is enormous, yeah, but fusion only really happens at the core. A very tiny fraction of the sun is doing the fusion, the rest jlgets heated up, makes gravity and such, bit doesn't really do anything of interest energy wise.

Fusion creates a shit tonne more energy than 150w/cm3. Heck, you've never seen what a nuke does

[–] [email protected] 1 points 3 hours ago* (last edited 3 hours ago)

No, OP is right - or rather, OP's physics professor. There's different kinds of fusion, though, and nobody's suggesting we do the exact same kind here on Earth (we basically can't).

Fusion creates a shit tonne more energy than 150w/cm3. Heck, you’ve never seen what a nuke does

That's power density (Watts). Multiply by 10 billion years to get energy density.