WHAT'S THE HIGHEST KNOWN TEMPERATURE?

The hottest thing that we know of (and have seen) is actually a lot closer than you might think. It's right here on Earth at the Large Hadron Collider (LHC). When they smash gold particles together for a split second, the temperature reaches 7.2 trillion degrees Fahrenheit. That's hotter than a supernova explosion. That's more than 366,000 times hotter than the center of the Sun. But can we go hotter? Theoretically, yes. The first contender for the hottest temperature is the Planck Temperature, which equals 100 million million million million million degrees. You just can't put this kind of temperature into perspective. There's simply no way to fully comprehend this number. This is as hot as you can get in normal physics, because once it gets any hotter conventional physics just doesn't work. If we try go any higher than the Planck Temperature physics breaks, literally. At the Planck Temperature gravity grows as strong as the other fundamental forces, and in essence, they all become one force. This is what we are looking for; the math behind the force. That's the theory of everything, a kind of quantum gravity. Unfortunately, for now, it is beyond us, and so the Planck Temperatue remains the ceiling or absolute hot. We're talking electromagnetic radiation here, because no material object, not even any elementary particle of matter can exist anywhere close to the Planck Temperatue. Photons are all you end up with. So, the maximum possible temperature is the temperature beyond which you can't pack any more energy into a photon.