The coldest place in our solar system is currently believed to be the Boomerang Nebula, which is a planetary nebula located about 5,000 light-years away from Earth. The Boomerang Nebula has an extremely low temperature of approximately 1 Kelvin (-272.15 degrees Celsius or -457.87 degrees Fahrenheit). This temperature is just slightly above absolute zero, which is the lowest possible temperature in the universe.
Absolute zero, denoted as 0 Kelvin or -273.15 degrees Celsius (-459.67 degrees Fahrenheit), is the theoretical point at which particles have no thermal energy and all molecular motion ceases. It is considered the lowest temperature that can be achieved in the universe according to the laws of thermodynamics. However, it is not possible to reach or surpass absolute zero in practice due to the fundamental limitations of cooling systems and the behavior of matter.
It's worth noting that the concept of temperature is defined based on the behavior of matter, and absolute zero represents the absence of thermal energy. Temperatures below absolute zero, in the negative Kelvin scale, do not have physical meaning within the traditional definition of temperature.