Get the latest tech news
Largest nuclear fusion reactor is finally completed
ITER, a $28 billion fusion reactor in France, has finally had its last magnetic coil installed. But the reactor itself won't fire up fully until 2039 at the earliest.
By fusing hydrogen atoms to make helium under extremely high pressures and temperatures, main-sequence stars convert matter into light and heat, generating enormous amounts of energy without producing greenhouse gases or long-lasting radioactive waste. Fusion reactors require very high temperatures (many times hotter than the sun) because they have to operate at much lower pressures than is found inside the cores of stars. Cooking plasma to these temperatures is the relatively easy part, but finding a way to corral it so that it doesn't burn through the reactor or derail the fusion reaction is technically tricky.
Or read this on Hacker News