Asked by: Begoï¿½a

Reference: Global Extremes by NOAA

Answered by: James Kriz, Biology Undergrad, Wayne State College, Wayne, NE

The lowest POSSIBLE temperature is absolute zero, which defines 0 degrees Kelvin (-273.15 degrees C. or -459.67 degrees F.) If by 'nature' you mean ANYWHERE outside a laboratory, intergalactic space would probably offer the lowest temperatures in the known Universe.

Temperature measures the average kinetic energy of any object's molecules or atoms. Since by definition it contains no matter, the vacuum of space itself has NO temperature. Atoms, molecules, and dust particles floating in in, however, would reach an equilibrium temperature with the cosmic background radiation left over from the Big Bang. That has been measured at a low of 2.724 K (-270.426 degrees C. or -454.767 degrees F.)

Answered by: Paul Walorski, B.A., Part-time Physics Instructor

'Physics is mathematical not because we know so much about the physical world, but because we know so little; it is only its mathematical properties that we can discover.'**Bertrand Russell**

(*1872-1970*)