<p>Let's assume that every particle in the Sun quantum tunneled far away from us (there's a near 0% chance this will happen, but let's just assume). For the first eight minutes, nothing would change from our point of view. Gravitational waves propagate at lightspeed, so we would continue to orbit the Sun and see it there. </p>

<p>After eight minutes, however, the lights would go out. The Moon will no longer shine upon us (it receives its light from the Sun), so our only source of light will be that of the celestial objects. Mercury and Venus will have seemingly disappeared from our optical telescopes — they will no longer be illuminated by the Sun. It would take another 30 minutes to an hour for the reflected light of Jupiter to shut off, and soon all the objects in the Solar System will no longer be visible to optical telescopes.</p>

<p>According to <a href="http://www.oocities.org/aa_institute1/ahads_constant_refereed_paper.pdf" rel="noreferrer">Ahad (2004)</a>, the illumination by the rest of the Milky Way would be approximately 1/300 of that of a Full Moon. So we might be able to see around thanks to the night sky and our own man-made technologies. However, most plants will not be able to undergo photosynthesis and will die.</p>

<p>At this point, we would be traveling tangentially to our orbit around the Sun, as you mention. We would just keep going into the abyss; it's very unlikely the gravity of any object will pull us in. However, things will get quite cold. The Earth would radiate heat away at a moderate rate, and temperatures would be unsustainable in most parts of the world after a year.</p>

<p>Luckily, the Earth has a nice and toasty core that could provide life-sustaining heat in some places (like Yellowstone), so humans that migrate over there would likely be better off.</p>

CC BY-SA 4.0
2021-02-23T13:36:23.227Z
The moon is 1.3 light seconds away from earth, so at full moon, the moon will keep shining for 2.6 seconds after the sun goes out. We are basically seeing the light-echo from the sun reflected off the moon.
JanKanis
CC BY-SA 3.0
2016-10-01T15:41:28.603Z
2016-10-01T15:41:28.603Z
Sir Cumference
<p>Since the universal speed limit is the speed of light, for the first 8 minutes nothing would change. Gravity would be the same, our orbit, as you mentioned heat and light would all be the same. Nothing would change until the final signals from the sun hit our planet and ended.</p>

CC BY-SA 3.0
2016-10-01T05:11:14.703Z
2016-10-01T05:11:14.703Z
CS2016
<p>It would take the same 8 minutes for the Earth's orbit to change as it does for us to stop receiving light from the Sun.  No signal travels faster than light.</p>

CC BY-SA 3.0
2016-10-01T04:42:50.497Z
2016-10-01T04:42:50.497Z
Ken G
<p>It takes 8 minutes for the sun's light to reach earth. If the sun were to instantly disappear, what would happen? I imagine that Earth would fly away on a path tangential to its orbit. What would happen to our heat and light during those first 8 minutes after the sun's disappearance? </p>

CC BY-SA 3.0
2016-10-01T06:39:47.423Z
What mechanism do you propose for the disappearance of the sun?
James K
CC BY-SA 3.0
2016-10-01T16:04:26.647Z
Related:  [Would the (orbitting) speed of the Earth change if suddenly the sun disappear and the Earth is thrown into space?](http://astronomy.stackexchange.com/questions/16184/would-the-orbitting-speed-of-the-earth-change-if-suddenly-the-sun-disappear-an)
ProfRob
CC BY-SA 3.0
2016-10-02T05:58:02.930Z
The Sun cannot instantly disappear per any known physics. This question is thus asking what the laws of physics say would happen when the laws of physics are violated. That doesn't make sense.
David Hammen
CC BY-SA 3.0
2016-10-03T01:15:46.130Z
FYI this has been asked **many many times** on the Physics site -- enjoy
Fattie
CC BY-SA 3.0
2016-10-03T02:47:59.140Z
@DavidHammen *Technically* all the particles in the Sun could hypothetically quantum tunnel elsewhere...but that's just a near-zero chance.
Sir Cumference
CC BY-SA 4.0
2018-05-18T12:11:17.537Z
This isn't really a duplicate of my question...
Ky -
CC BY-SA 4.0
2019-01-12T12:11:08.430Z
Related video: [What If the Sun Disappeared Right Now?](https://www.youtube.com/watch?v=YAjDtCuOHrA)
kenorb
<the-sun><earth><astrophysics>
Sudden Effects of Sun Disappearing
user14417
# Sudden Effects of Sun Disappearing

(Asked by: username_0 on 2016-10-01)

It takes 8 minutes for the sun's light to reach earth. If the sun were to instantly disappear, what would happen? I imagine that Earth would fly away on a path tangential to its orbit. What would happen to our heat and light during those first 8 minutes after the sun's disappearance?

**Tags:** the-sun, earth, astrophysics
> **Comments:**
> **username_1**: What mechanism do you propose for the disappearance of the sun?  
> **username_2**: Related:  [Would the (orbitting) speed of the Earth change if suddenly the sun disappear and the Earth is thrown into space?](http://astronomy.stackexchange.com/questions/16184/would-the-orbitting-speed-of-the-earth-change-if-suddenly-the-sun-disappear-an)  
> **username_3**: The Sun cannot instantly disappear per any known physics. This question is thus asking what the laws of physics say would happen when the laws of physics are violated. That doesn't make sense.  
> **username_4**: FYI this has been asked **many many times** on the Physics site -- enjoy  
> **username_5**: @DavidHammen *Technically* all the particles in the Sun could hypothetically quantum tunnel elsewhere...but that's just a near-zero chance.  
> **username_6**: This isn't really a duplicate of my question...  
> **username_7**: Related video: [What If the Sun Disappeared Right Now?](https://www.youtube.com/watch?v=YAjDtCuOHrA)  

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## 3 answers

### Answer by username_5 on 2016-10-01. Score: 8

Let's assume that every particle in the Sun quantum tunneled far away from us (there's a near 0% chance this will happen, but let's just assume). For the first eight minutes, nothing would change from our point of view. Gravitational waves propagate at lightspeed, so we would continue to orbit the Sun and see it there.

After eight minutes, however, the lights would go out. The Moon will no longer shine upon us (it receives its light from the Sun), so our only source of light will be that of the celestial objects. Mercury and Venus will have seemingly disappeared from our optical telescopes — they will no longer be illuminated by the Sun. It would take another 30 minutes to an hour for the reflected light of Jupiter to shut off, and soon all the objects in the Solar System will no longer be visible to optical telescopes.

According to [Ahad (2004)](http://www.oocities.org/aa_institute1/ahads_constant_refereed_paper.pdf), the illumination by the rest of the Milky Way would be approximately 1/300 of that of a Full Moon. So we might be able to see around thanks to the night sky and our own man-made technologies. However, most plants will not be able to undergo photosynthesis and will die.

At this point, we would be traveling tangentially to our orbit around the Sun, as you mention. We would just keep going into the abyss; it's very unlikely the gravity of any object will pull us in. However, things will get quite cold. The Earth would radiate heat away at a moderate rate, and temperatures would be unsustainable in most parts of the world after a year.

Luckily, the Earth has a nice and toasty core that could provide life-sustaining heat in some places (like Yellowstone), so humans that migrate over there would likely be better off.

> **Comments:**
> **username_8**: The moon is 1.3 light seconds away from earth, so at full moon, the moon will keep shining for 2.6 seconds after the sun goes out. We are basically seeing the light-echo from the sun reflected off the moon.  

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### Answer by username_9 on 2016-10-01. Score: 0

Since the universal speed limit is the speed of light, for the first 8 minutes nothing would change. Gravity would be the same, our orbit, as you mentioned heat and light would all be the same. Nothing would change until the final signals from the sun hit our planet and ended.


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### Answer by username_10 on 2016-10-01. Score: 0

It would take the same 8 minutes for the Earth's orbit to change as it does for us to stop receiving light from the Sun. No signal travels faster than light.


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