How Cold Can It Get?

[Vikrant]

We live in a part of space which is far from being absolute cold. On Earth depending on where we live, we experience varied degrees of cold. So just for fun I wanted to take you on a journey from a tropical climate to Absolute Zero which exists only in the dark regions of space far from any star.

If you live in hot desert, 20C probably will be quite cold for you and you may want to wear jacket. Although people in Canada will laugh at you.

Most household refrigerators are set to 4C. The freezers usually keep their contents at -18C.

There are parts of Himalaya where human beings have to endure -40C.

There are regions such as N Canada and Alaska where temperatures can fall as low as -60C.

I believe Antarctic is the coldest place on Earth with a temperature of -90C.

Natural gas is stored at -163C during its transport. It is called Liquefied Natural Gas.

Oxygen become liquid at -183C. This is not good. How the hell are we going to breathe? We may have to swim in it like fish.

If the temperature were to fall below -196C, majority of our atmospheric gas such as Nitrogen will be liquefied.

Hydrogen becomes liquid at -253C.

Helium turns into a cold beverage at -269C.

When we reach -273C, it is called Absolute Zero. At this temperature molecules even atoms lose their incessant motions.

 

[Delta4Embassy]

Absolute zero can't occur naturally.

Interestingly, it's not really absolute, not anymore...

"(Phys.org)—A team of physicists in Germany have succeeded in forcing a gas to become colder than absolute zero. Using lasers and a magnetic field to manipulate an ultra-cold gas, the researchers, as they describe in their paper published in the journal Science, managed to coax the temperature of the gas to a few billionths of a Kelvin below absolute zero."
Researchers force a gas to a temperature below absolute zero

 

[Pennywise]

Scientific hypotheses aside, we are in the beginning stages of a massive cool down. Everyone, even the AGW freaks know this, hence the name change to climate change.

Bottom line in all of it- there is no "correct" climate to the earth. There is a preferred climate that fosters the most natural growth and least discomfort, but to imagine that we have some grand insight that anything other than what we know now is somehow bad, is so stupid as to be unworthy of sincere discussion.

 

[Vikrant]

Absolute zero can't occur naturally.

Interestingly, it's not really absolute, not anymore...

"(Phys.org)—A team of physicists in Germany have succeeded in forcing a gas to become colder than absolute zero. Using lasers and a magnetic field to manipulate an ultra-cold gas, the researchers, as they describe in their paper published in the journal Science, managed to coax the temperature of the gas to a few billionths of a Kelvin below absolute zero."
Researchers force a gas to a temperature below absolute zero

Was the temperature lower than -273C? If so, what was the temperature?

 

[Vikrant]

Wow! Billionth of a Kelvin. That is cold. MIT set a new record in 2003 of 0.45 nK.

What Is Absolute Zero

 

[Vikrant]

Let us start by asking what temperature actually is. Temperature of a given system is basically a measurement of average velocity (kinetic energy) of molecules in the system. Temperature is a means to measure the internal energy (such as heat) in a system. So temperature comes into play only when we are dealing with matter. If there is no matter then there is no temperature aka absolute zero. But the problem is we have quite a bit of radiation everywhere in the universe which makes it impossible to have absolute zero but as time goes by and the universe loses its radiation, we will start to approach absolute zero. I do not know if we will ever get to a point where the temperature will be absolute zero.

 

[Delta4Embassy]

Absolute zero can't occur naturally.

Interestingly, it's not really absolute, not anymore...

"(Phys.org)—A team of physicists in Germany have succeeded in forcing a gas to become colder than absolute zero. Using lasers and a magnetic field to manipulate an ultra-cold gas, the researchers, as they describe in their paper published in the journal Science, managed to coax the temperature of the gas to a few billionths of a Kelvin below absolute zero."
Researchers force a gas to a temperature below absolute zero

Was the temperature lower than -273C? If so, what was the temperature?

"A few billionths of a Kelvin below Ab Zero." So probably like -273.000000001 C or something like that.