This is the view inside the doughnut-shaped JET reactor, the largest fusion device on Earth. During a reaction, nuclear fuels are held away from the walls by electromagnets, and reach temperatures more than ten times hotter than the core of the sunFrom The Daily Mail:
The JET fusion reactor looks more like the lair of a Bond villain than an extraordinary British experiment that might save the world.
The highly compacted core of the sun is a very hot place indeed.
In the star's burning heart, hydrogen atoms collide at immense speeds. This welds them together and turns them into helium atoms, which each release a burst of energy that escapes into the solar system as light. It is a nuclear furnace, responsible for fuelling all life on Earth, that consumes a lot of hydrogen (600 million tons every second) at very high temperatures (over 15 million degrees C). As such, it's the second-hottest place in the solar system.
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