| Only in the study of quantum liquids at temperatures close to absolute zero does experimental accuracy approach Heisenberg's limit. |
| The behaviour of a gas at temperatures close to absolute zero depends on whether the atoms in the gas are fermions or bosons. |
| At the point on the graph where the volume of the gas is zero, the theoretical temperature is absolute zero, the coldest temperature possible. |
| In the billions of years since, they have cooled to less than three degrees Kelvin above absolute zero, equivalent to microwave frequencies. |
| After having cooled off for many billions of years, the temperature of this radiation is just a few degrees above absolute zero. |
| The gas's Fermi temperature itself is about 2 millionths of a degree above absolute zero. |
