Hawking's temperature equation

I watched Nova on PBS about black holes. Hawking came up with an equation measuring the temperature of a black hole. I wondered if a vacuum could have a temperature so I looked into it.

https://www.scienceabc.com/nature/universe/what-is-the-temperature-of-space.html

A perfect vacuum has no temperature, as there is nothing in a vacuum whose temperature could be measured. So, in essence, you cannot technically measure the temperature of outer space.
So what does Hawking mean by "temperature"?

@Metal-Brain
This might shed some light on your question

https://jila.colorado.edu/~ajsh/bh/hawk.html#:~:text=Hawking%20radiation%20has%20a%20blackbody,the%20horizon%2C%20the%20Schwarzschild%20radius

@ponderable said
@Metal-Brain
This might shed some light on your question

https://jila.colorado.edu/~ajsh/bh/hawk.html#:~:text=Hawking%20radiation%20has%20a%20blackbody,the%20horizon%2C%20the%20Schwarzschild%20radius

@metal-brain said
I watched Nova on PBS about black holes. Hawking came up with an equation measuring the temperature of a black hole. I wondered if a vacuum could have a temperature so I looked into it.

https://www.scienceabc.com/nature/universe/what-is-the-temperature-of-space.html

A perfect vacuum has no temperature, as there is nothing in a vacuum whose temperature could be mea ...[text shortened]... not technically measure the temperature of outer space.
So what does Hawking mean by "temperature"?

@Suzianne
Yep, usually the mass of several suns in a space the size of Earth or less, not exactly vacuum in any regard.

I thought a perfect vacuum was thought to be impossible to achieve, even in theory. At the quantum level there are always particles churning in and out of existence.

@Soothfast
yes, you can get close but no cigar🙂

@suzianne said
A black hole is not a vacuum.

Well, it is in the "Hoover" sense of a vacuum, but when you're speaking of the vacuum of space, black holes do not qualify.

@Metal-Brain
Tell that to Stephan Hawking. Ever hear of Hawking radiation? No I guess not, since all you watch is Newsmax and Fox news.

@metal-brain said
You are wrong. There is nothing that can escape a black hole so it is a vacuum.
You are such a retard.

@ponderable said
In fact a vacuum is defined as a volume with "no" contents. And there is Quantum fluctuation as @Soothfast explained.
And if you want to define a black hole as "vacuum" then in the "Hoover" sense @Suzianne appreciated before.

It is more a sign of a "retard" not to use the generally accepted definition of words and concepts than otherwise. In scientific discussions we n ...[text shortened]... ey should see things more like we do.

Edits because of being too lazy to reread before posting 🙁

@metal-brain said
I never said a black hole was a vacuum.

There is nothing that can escape a black hole so it is a vacuum.

@sonhouse said
@Metal-Brain
Tell that to Stephan Hawking. Ever hear of Hawking radiation? No I guess not, since all you watch is Newsmax and Fox news.

@ponderable said
I quote your own post (which I quoted in my last post):

There is nothing that can escape a black hole so it is a vacuum.

Read the sentence slowly, especially the last seven words.

@metal-brain said
It is a vacuum for matter, not radiation.
Is that better?