# How does gravity react with anti matter?
**URL:** https://boards.straightdope.com/t/how-does-gravity-react-with-anti-matter/778983
**Category:** Factual Questions
**Created:** [February 4, 2017, 3:14pm UTC](https://boards.straightdope.com/t/how-does-gravity-react-with-anti-matter/778983 "2017-02-04T15:14:05Z")
**Posts on this page:** 6
**Page:** 6
### Author:  [@DSeid](https://boards.straightdope.com/u/DSeid)
#### Post date: [November 9, 2023, 7:53pm UTC](https://boards.straightdope.com/t/how-does-gravity-react-with-anti-matter/778983/101 "2023-11-09T19:53:26Z")
I _think_ I am starting to get it some … but just enough to know I don’t really … 😀
Thanks very much.
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### Author:  [@zimaane](https://boards.straightdope.com/u/zimaane)
#### Post date: [November 9, 2023, 11:21pm UTC](https://boards.straightdope.com/t/how-does-gravity-react-with-anti-matter/778983/102 "2023-11-09T23:21:58Z")
> [@Pasta](#):
>
> Cosmic rays are raining down on us all the time. At Earth’s surface, the cosmic ray flux is mostly muons and antimuons. So, you’re hit with antiparticles (and similar particles) all the time.
Correct me if I’m wrong, but I think that the muons and anti-muons that reach the Earth’s surface are secondary products created when high energy cosmic rays strike the upper atmosphere and various processes create the particles that actually reach the ground.
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### Author:  [@Pasta](https://boards.straightdope.com/u/Pasta)
#### Post date: [November 9, 2023, 11:26pm UTC](https://boards.straightdope.com/t/how-does-gravity-react-with-anti-matter/778983/103 "2023-11-09T23:26:46Z")
> [@zimaane](#):
>
> Correct me if I’m wrong, but I think that the muons and anti-muons that reach the Earth’s surface are secondary products created when high energy cosmic rays strike the upper atmosphere and various processes create the particles that actually reach the ground.
Yep, that’s correct.
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### Author:  [@Ynnad](https://boards.straightdope.com/u/Ynnad)
#### Post date: [November 13, 2023, 1:16am UTC](https://boards.straightdope.com/t/how-does-gravity-react-with-anti-matter/778983/104 "2023-11-13T01:16:34Z")
If you push something hard enough, it will fall over. - Fudd’s First Law of Opposition.
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### Author:  [@Derleth](https://boards.straightdope.com/u/Derleth)
#### Post date: [November 13, 2023, 1:38am UTC](https://boards.straightdope.com/t/how-does-gravity-react-with-anti-matter/778983/105 "2023-11-13T01:38:26Z")
Well, we can be sure antimatter is a power so great, it can only be used for good or evil.
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### Author:  [@Exapno\_Mapcase](https://boards.straightdope.com/u/Exapno_Mapcase)
#### Post date: [March 11, 2024, 7:35pm UTC](https://boards.straightdope.com/t/how-does-gravity-react-with-anti-matter/778983/106 "2024-03-11T19:35:03Z")
I happened to read Frank Close’s [Antimatter (Oxford Landmark Science)](https://www.amazon.com/stores/Frank-Close/author/B0032LWBQU?ref=ap_rdr&isDramIntegrated=true&shoppingPortalEnabled=true) and immediately thought of this thread.
Close is a working physicist (or was; he may be retired now) who started writing books for the popular audience. _Antimatter_ is short and math-free, but it talks about the subject in detail and from many angles. Along the way it addresses and answers many of the questions in this thread.
If any of you want a good quick primer on the issues, I’d recommend it.
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