On Earth and Beyond....

So, exaclty how cold is absolute zero? To help put it in perspective, the lowest temperature ever recorded on Earth was in Antarctica was a chilly -89 degrees Celsius, which is rather warm in terms of absolute zero at a temperature of 184 Kelvin.

Triton, which is a moon in the atmosphere of Neptune, is the coldest place in our solar system. The atmosphere of Triton contains vast amounts of methane and liquid nitrogen. The temperatures recorded at Triton were -235 degrees Celsius, or 38 degrees Kelvin. At this temperature, nitrogen freezes just as water does on Earth!

Even colder than our solar system is the deep realm of space. Outer space has a temperature due to black body radiation, mostly from the light and heat from the sun. Space has been measured to be at 2.73 degrees Kelvin by the COsmic Background Explorere (COBE) satellite. Scientists also believe that the radiation of outer space is remnant of the Big Bang. 2.73 degrees Kelvin is believed to be the lowest possible naturally ocurring temperature that can ever take place.

Triton, a satellite of Neptune, has the lowest recorded temperature in our solar system.

http://nssdc.gsfc.nasa.gov/image/planetary/neptune/triton_close.jpg