<p>Yes, eventually <em>everything</em> will indeed stop spinning.</p>
<p>When a pulsar is created, it retains almost all of the previous star's angular momentum, while losing most of its size. This is why they spin so fast and <em>pulsate</em> electromagnetic radiation.</p>
<p>As they lose energy and momentum overtime their rotation will slow down; but even sooner, they will lose the radio pulsating mechanism that makes them pulsars in the first place.</p>
<p>This &quot;turnoff&quot; point is actually shorter than one might expect: a normal pulsar will stop pulsating just after a few hundred million years (<strong>most</strong> of the pulsars that have been born up to now are no longer pulsating).</p>

CC BY-SA 4.0
2021-08-17T09:44:08.010Z
So does the air resistance has to do with the slow down of stars?
Jack the Ranger
CC BY-SA 4.0
2021-08-17T10:14:35.357Z
Why do you think there would be air near a neutron star? There is no air in space. I mean air (https://www.merriam-webster.com/dictionary/air) as the mixture of gases that surround Earth. When you say air do you mean something else?
Prallax
CC BY-SA 4.0
2021-08-17T10:27:55.567Z
@Prallax How about interstellar medium? As they are composed of gas, and I'm not just ask for pulsars, but all stars as well, maybe the title I made is a little bit misleading.
Jack the Ranger
CC BY-SA 4.0
2021-08-17T10:39:23.860Z
@JacktheRanger ok, with "interstellar medium" it makes much more sense to me. I suggest you write another question instead of editing this one, since there are already two answers that talk about pulsars
Prallax
CC BY-SA 4.0
2021-08-17T09:35:00.650Z
2021-08-17T09:35:00.650Z
Marco Leonardi
<p>As long as pulsars are usually 'high rate' emitting neutron stars (including visible light, near infrared, ultraviolet, X-rays, and gamma rays) the emission will eventually decrease electromagnetic radiation.
Eventually, pulsar-neutron star will become non-pulsating neutron star.</p>
<p><a href="https://en.wikipedia.org/wiki/Neutron_star#Pulsars" rel="nofollow noreferrer">Wikipedia</a>:</p>
<p>On the other hand, neutron star rotational speeds can increase (spin up process). Sometimes neutron stars absorb orbiting matter from companion stars, increasing the rotation rate.</p>
<p>The most rapidly rotating neutron stars currently known are:
PSR J1748-2446ad, rotates at 716 rotations per second;
XTE J1739-285, 1122 rotations a second.</p>

CC BY-SA 4.0
2021-08-17T10:08:32.853Z
2021-08-17T10:08:32.853Z
Lariliss
<p>In the book &quot;Horizons: exploring the universe-Cengage learning (2018)&quot;, page 224, it states that:</p>
<blockquote>
<p>When a pulsar first forms, it is spinning fast, perhaps a hundred times a second. The energy it radiates into space comes from its energy of rotation, so as it blasts beams of radiation outward,
its rotation slows.</p>
</blockquote>
<blockquote>
<p>The average pulsar is apparently only a few million years old, and the oldest are about 10 million years old. Presumably, older neutron stars rotate too slowly to generate detectable radio beams.</p>
</blockquote>
<p>So will pulsars eventually stop spinning due to the energy it radiates into space? As there are no extra energy sources that give pulsars to spin. And I know the space is basically empty space, but will air resistance be a factor that slows the spinning of pulsars or other stars?</p>

<star><stellar-evolution>
Will pulsars stop spinning eventually?
Jack the Ranger
# Will pulsars stop spinning eventually?

(Asked by: username_0 on 2021-08-17)

In the book "Horizons: exploring the universe-Cengage learning (2018)", page 224, it states that:

> When a pulsar first forms, it is spinning fast, perhaps a hundred times a second. The energy it radiates into space comes from its energy of rotation, so as it blasts beams of radiation outward,
> its rotation slows.

> The average pulsar is apparently only a few million years old, and the oldest are about 10 million years old. Presumably, older neutron stars rotate too slowly to generate detectable radio beams.

So will pulsars eventually stop spinning due to the energy it radiates into space? As there are no extra energy sources that give pulsars to spin. And I know the space is basically empty space, but will air resistance be a factor that slows the spinning of pulsars or other stars?

**Tags:** star, stellar-evolution


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## 2 answers

### Answer by username_1 on 2021-08-17. Score: 4 | Accepted answer

Yes, eventually *everything* will indeed stop spinning.

When a pulsar is created, it retains almost all of the previous star's angular momentum, while losing most of its size. This is why they spin so fast and *pulsate* electromagnetic radiation.

As they lose energy and momentum overtime their rotation will slow down; but even sooner, they will lose the radio pulsating mechanism that makes them pulsars in the first place.

This "turnoff" point is actually shorter than one might expect: a normal pulsar will stop pulsating just after a few hundred million years (**most** of the pulsars that have been born up to now are no longer pulsating).

> **Comments:**
> **username_0**: So does the air resistance has to do with the slow down of stars?  
> **username_2**: Why do you think there would be air near a neutron star? There is no air in space. I mean air (https://www.merriam-webster.com/dictionary/air) as the mixture of gases that surround Earth. When you say air do you mean something else?  
> **username_0**: @username_2 How about interstellar medium? As they are composed of gas, and I'm not just ask for pulsars, but all stars as well, maybe the title I made is a little bit misleading.  
> **username_2**: @JacktheRanger ok, with "interstellar medium" it makes much more sense to me. I suggest you write another question instead of editing this one, since there are already two answers that talk about pulsars  

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### Answer by username_3 on 2021-08-17. Score: 0

As long as pulsars are usually 'high rate' emitting neutron stars (including visible light, near infrared, ultraviolet, X-rays, and gamma rays) the emission will eventually decrease electromagnetic radiation.
Eventually, pulsar-neutron star will become non-pulsating neutron star.

[Wikipedia](https://en.wikipedia.org/wiki/Neutron_star#Pulsars):

On the other hand, neutron star rotational speeds can increase (spin up process). Sometimes neutron stars absorb orbiting matter from companion stars, increasing the rotation rate.

The most rapidly rotating neutron stars currently known are:
PSR J1748-2446ad, rotates at 716 rotations per second;
XTE J1739-285, 1122 rotations a second.


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