Absolute Zero

Definition of the Lowest Possible Temperature

Absolute zero is the lowest possible temperature. It is the point at which the atoms of a substance transmit no thermal energy - they are completely at rest. It is zero degrees on the Kelvin scale, which translates to -273.15 degrees Celsius or -459.67 degrees Fahrenheit.

The concept of an "absolute cold" was first presented by Robert Boyle in his 1665 New Experiments and Observations touching Cold.

Various physicists explored this phenomenon, until Lord Kelvin derived his thermodynamic temperature scale, extrapolating backward to absolute zero based purely on the laws of thermodynamics.

Some substances, when cooled to near-absolute zero temperatures, reach a state of matter known as a superfluid and exhibit strange properties.