If there is absolute zero, is there absolute hot?
The concept of absolute zero is well understood, but ‘absolute hot’ is more enigmatic. Heat is a form of energy associated with the motion of the atoms that make up matter. The colder it gets, the less particles move and vibrate, winding down to a virtual standstill at absolute zero, measured at zero Kelvin, or -273 degrees Celsius. At the other end of the scale, conventional physics sets the theoretical maximum temperature at 1.4 x 1032 Kelvin: the Planck temperature, believed to have last occurred a fraction of a second after the Big Bang.