# Dark matter and the temperature of the universe

**URL:** <https://boards.straightdope.com/t/dark-matter-and-the-temperature-of-the-universe/733893>\
**Category:** Factual Questions\
**Created:** [October 8, 2015, 12:56am UTC](https://boards.straightdope.com/t/dark-matter-and-the-temperature-of-the-universe/733893 "2015-10-08T00:56:44Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![am77494](https://avatars.discourse-cdn.com/v4/letter/a/d2c977/32.png) [@am77494](https://boards.straightdope.com/u/am77494)\
**Post date:** [October 8, 2015, 12:56am UTC](https://boards.straightdope.com/t/dark-matter-and-the-temperature-of-the-universe/733893/1 "2015-10-08T00:56:44Z")

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Do the current theories around dark matter say anything about :

1. How the currently measured universe temperature ( through background radiation) may not be correct ?

2. The initial temperature of the universe (at the Big Bang) ?

3. How temperature has decayed from the Big Bang to now ?

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**Author:** ![JWT\_Kottekoe](https://avatars.discourse-cdn.com/v4/letter/j/3ec8ea/32.png) [@JWT\_Kottekoe](https://boards.straightdope.com/u/JWT_Kottekoe)\
**Post date:** [October 8, 2015, 1:28am UTC](https://boards.straightdope.com/t/dark-matter-and-the-temperature-of-the-universe/733893/2 "2015-10-08T01:28:39Z")

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The accepted theory includes dark matter and dark energy and can accurately model the temperature back to a time very shortly after the big bang. The calculation is pretty easy back to about t = 300,000 years (we are currently at t = 13,800,000,000 years). Before that it gets more complicated, ultimately involving temperatures in the first fraction of a second that are so high that we do not understand the physics.