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<blockquote data-quote="freyar" data-source="post: 5028938" data-attributes="member: 40227">I think we need to keep in mind that you two are using different definitions of &quot;space.&quot;&nbsp; I think you (and the OP) are using a colloquial definition, which includes the general contents of the regions between planets and stars as part of &quot;space.&quot; (Note then that space is very different in our solar system vs between stars in our galaxy vs between galaxies.)&nbsp; The response from Umbran's argument is that you're again talking about stuff in space, not space itself.&nbsp; Space is the stage upon which matter struts its stuff and has no temperature itself.&nbsp; With that strict definition, he's right, space has no temperature.*&nbsp; I'll also add, as in my last post, that you can't always define a temperature for a given lump of matter or radiation.*Until you start talking about quantum gravity.&nbsp; Stephen Hawking is famous for demonstrating that there are at least some situations when you should think of space itself as having a temperature.&nbsp; But I think that's a different subject.</blockquote>

[QUOTE="freyar, post: 5028938, member: 40227"] I think we need to keep in mind that you two are using different definitions of "space." I think you (and the OP) are using a colloquial definition, which includes the general contents of the regions between planets and stars as part of "space." (Note then that space is very different in our solar system vs between stars in our galaxy vs between galaxies.) The response from Umbran's argument is that you're again talking about [i]stuff in[/i] space, not space itself. Space is the stage upon which matter struts its stuff and has no temperature itself. With that strict definition, he's right, space has no temperature.* I'll also add, as in my last post, that you can't always define a temperature for a given lump of matter or radiation. *Until you start talking about quantum gravity. Stephen Hawking is famous for demonstrating that there are at least some situations when you should think of space itself as having a temperature. But I think that's a different subject. [/QUOTE]

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