A stunning new video has revealed a look inside the Wendelstein 7-X ‘stellarator’ fusion reactor – the largest of its kind in the world.

The video includes a compilation of footage from tests at the massive device, as scientists work to bring humanity closer to achieving ‘limitless’ energy by mimicking the conditions inside the sun.

Bright flashes can be seen erupting inside the reactor, showing the path of super-heated-plasma.

Wendelstein 7-X is located in Greifswald, Germany.

And, researchers involved in the project say it’s the largest stellarator fusion device on Earth.

The video shared by researchers at the Max-Planck Institute for Plasma Physics and the Wigner Research Centre for Physics reveals a jaw-dropping look at the processes that take place on the inside.

The reactor switched on for the first time two years ago – and, just last December, a research paper on the initial tests revealed everything was working as expected.

To read more and view the video, click here.