Flexi Says: The theoretical highest temperature in the universe is 1032 K. This temperature, known as the Planck temperature, is based on the standard model of particle physics, and is the theoretical temperature at essentially the beginning of the Big Bang when the entire universe was contained in a minuscule point on the scale of the Planck length, 10-35 meters.
The highest temperature that scientists have measured is 2 trillion kelvins (2 x 1012). This extreme temperature was actually created in an experiment on Earth, at the Large Hadron Collider in Europe. In the experiment, scientists collided lead nuclei that traveled toward each other at nearly light-speed. When they collided, they produced a hot plasma with a temperature far higher than the surface of stars. By contrast, the hottest known star is only 210,000 K!
