What is the approximate of absolute zero?
That means that the temperature gets close, or near, absolute zero (zero Kelvin, or minus 273.15 Celsius).
It is the coldest temperature. Nothing is colder than absolute zero. Scientists do know what happens in absolute zero because to get it to absolute zero, they have to put the object in something colder. But like mentioned above, nothing is colder than absolute zero. It is pretty much the end of the thermometer.