<p>First thing, Proxima Centauri <strong>cannot go supernova.</strong> It is only <span class="math-container">$0.12 M_\odot$</span>, while core-collapse supernovae can only be triggered by stars that are more massive than <span class="math-container">$8 M_\odot$</span>. Now the only exception here is if it undergoes a type Ia supernova, but this is very unrealistic because Proxima won't become a white dwarf in trillions of years and is not part of a binary system that is close enough to engage in mass transfer.</p>
<p>To answer your second question, the answer is also <strong>no.</strong>  To affect the Earth significantly, it needs to pass very close (less than 100-1000 AU), which is virtually impossible. Proxima will not approach closer than 3 light years from our Sun in the near future, so it absolutely has no effect on the Solar System. See <a href="https://astronomy.stackexchange.com/a/41001/31410">my answer regarding stellar collisions.</a></p>

CC BY-SA 4.0
2021-06-02T14:53:19.140Z
As an ordinary star Proxima Centauri would have to get very close forits gravity to mess  up the solar system.  But if it could somehow turn into a supernova, a supernova at the distance of Proima Centauri would be very bad for life on Earth.
M. A. Golding
CC BY-SA 4.0
2022-03-09T19:05:08.547Z
According to [this site](https://earthsky.org/astronomy-essentials/safe-distance-from-a-supernova-earth/#:~:text=Bottom%20line%3A%20What's%20a%20safe,away%20from%20the%20exploding%20star), the safest distance from a supernova is at least 50 light years.
Snack Exchange
CC BY-SA 4.0
2021-06-02T00:57:57.643Z
2021-06-02T00:57:57.643Z
WarpPrime
<p>Proxima Centauri is the closest star to the Earth (besides our Sun). If it went supernova, would such an event negatively affect the Earth? Can Proxima Centauri negatively affect the Earth in some other fashion?</p>

CC BY-SA 4.0
2021-06-02T00:29:34.077Z
Proxima Centauri is an M5 dwarf. It will never go supernova.
AtmosphericPrisonEscape
CC BY-SA 4.0
2021-06-02T00:35:13.893Z
And what about the second part of the OP?
tale852150
CC BY-SA 4.0
2021-06-02T00:36:22.627Z
@fasterthanlight answered the first part (and thank you for getting this gist of my question) but not the second.
tale852150
CC BY-SA 4.0
2021-06-02T00:46:14.927Z
The simple answer to that is **no.** To affect the Earth significantly, it needs to pass very close (less than 100-1000 AU), which is virtually impossible.
WarpPrime
CC BY-SA 4.0
2021-06-02T00:48:53.817Z
@fasterthanlight Ok, great. Now I need one of you to combine your comments as an answer and then I can accept it.
tale852150
CC BY-SA 4.0
2021-06-02T02:16:22.690Z
See https://earthsky.org/astronomy-essentials/supernove-distance/ for the effects of nearby supernovae
planetmaker
CC BY-SA 4.0
2021-06-02T02:17:07.477Z
@planetmaker thx. I’ll check it out
tale852150
<star><astrophysics>
If Proxima Centauri goes supernova will it negatively affect the Earth?
tale852150
# If Proxima Centauri goes supernova will it negatively affect the Earth?

(Asked by: username_0 on 2021-06-02)

Proxima Centauri is the closest star to the Earth (besides our Sun). If it went supernova, would such an event negatively affect the Earth? Can Proxima Centauri negatively affect the Earth in some other fashion?

**Tags:** star, astrophysics
> **Comments:**
> **username_1**: Proxima Centauri is an M5 dwarf. It will never go supernova.  
> **username_0**: And what about the second part of the OP?  
> **username_0**: @fasterthanlight answered the first part (and thank you for getting this gist of my question) but not the second.  
> **username_2**: The simple answer to that is **no.** To affect the Earth significantly, it needs to pass very close (less than 100-1000 AU), which is virtually impossible.  
> **username_0**: @fasterthanlight Ok, great. Now I need one of you to combine your comments as an answer and then I can accept it.  
> **username_3**: See https://earthsky.org/astronomy-essentials/supernove-distance/ for the effects of nearby supernovae  
> **username_0**: @planetmaker thx. I’ll check it out  

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## 1 answers

### Answer by username_2 on 2021-06-02. Score: 4 | Accepted answer

First thing, Proxima Centauri **cannot go supernova.** It is only $0.12 M\_\odot$, while core-collapse supernovae can only be triggered by stars that are more massive than $8 M\_\odot$. Now the only exception here is if it undergoes a type Ia supernova, but this is very unrealistic because Proxima won't become a white dwarf in trillions of years and is not part of a binary system that is close enough to engage in mass transfer.

To answer your second question, the answer is also **no.** To affect the Earth significantly, it needs to pass very close (less than 100-1000 AU), which is virtually impossible. Proxima will not approach closer than 3 light years from our Sun in the near future, so it absolutely has no effect on the Solar System. See [my answer regarding stellar collisions.](https://astronomy.stackexchange.com/a/41001/31410)

> **Comments:**
> **username_4**: As an ordinary star Proxima Centauri would have to get very close forits gravity to mess  up the solar system.  But if it could somehow turn into a supernova, a supernova at the distance of Proima Centauri would be very bad for life on Earth.  
> **username_5**: According to [this site](https://earthsky.org/astronomy-essentials/safe-distance-from-a-supernova-earth/#:~:text=Bottom%20line%3A%20What's%20a%20safe,away%20from%20the%20exploding%20star), the safest distance from a supernova is at least 50 light years.  

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