What’s it like inside a massive galaxy cluster? Scientists used 196 lasers to find out.

An Earthbound experiment is replicating the extreme heat found in galaxy clusters located in deep space using nearly 200 lasers.

The hope is the experiment series will reveal more about the conditions within giant groups of galaxies. Here, hydrogen gas can burn at roughly the same temperatures as it does the center of our sun, or roughly 18 million degrees Fahrenheit (10 million degrees Celsius).