<p>The opposite. The Earth orbits at 30 km/s. The Sun's material would not have comparable net rotation, so the Earth would be subjected to a 30 km/s wind. This wind would easily strip off the Earth's atmosphere, and it would continue to strip any of the Sun's gas that got temporarily captured by the Earth.</p>
<p>Even without the wind, the temperature would likely be far too high for any gas to remain bound to the Earth, because the thermal velocities would exceed the Earth's escape velocity.</p>

CC BY-SA 4.0
2024-03-30T00:07:18.973Z
Would a solar expansion to 1AU put enough resistance on earth that it would start to slow down and spiral into the sun?
Questor
CC BY-SA 4.0
2024-03-30T11:23:37.167Z
Wouldn't the Earth's magnetic field cause the solar wind to strike the Earth directly causing Northern Lights instead of strip away the Earth's atmosphere?
Russell Hankins
CC BY-SA 4.0
2024-03-30T16:25:08.687Z
@RussellHankins It depends on how much wind there is. Particles trapped in a magnetic field exert their own magnetic field in the opposite direction. With enough charged particles, the Earth's magnetic field would be completely counteracted.
Sten
CC BY-SA 4.0
2024-03-30T16:27:29.223Z
@Questor Indeed, the earth would slow down gradually and, given enough time, sink into the sun. Not my field but, last I heard, this is the expected outcome.
Sten
CC BY-SA 4.0
2024-04-07T17:37:49.507Z
The speed of the wind is not the crucial issue here. The present solar wind speed is a lot higher (several hundred km/sec). It is its density that would make all the difference (not to mention the vastly increased radiation intensity)
Thomas
CC BY-SA 4.0
2024-03-29T17:43:53.597Z
2024-03-29T18:10:44.470Z
2024-03-29T18:10:44.470Z
Sten
<p>Funny you say that. Basically, <strong>No.</strong> Actually the <em>literal opposite</em> will happen.</p>
<p>As others have said, the wind caused by the expansion of the sun will be so incredibly fast (30 kilometers per <strong>second</strong>) that all gasses will be stripped away from our planet. The heat will also strip all of the gasses because of the thermal velocity being higher than earth's <em>escape velocity</em>. After that all happens, the sun will slowly slow it down before the planet corkscrews into the sun.</p>

CC BY-SA 4.0
2024-04-04T01:17:01.190Z
Wouldn't a significant portion of the mass be in mars's orbit and jupiter's orbit?So the Earth once it expands back into a bigger orbit can absorb some of the mass. So maybe 3 Earths worth of hydrogen. So it will still gain mass right?
MiltonTheMeme
CC BY-SA 4.0
2024-04-04T16:48:07.963Z
@MiltonTheMeme That'd be a good thing to do more research on. I didn't think of that, nice thought. :-)
Deko Revinio
CC BY-SA 4.0
2024-04-07T17:38:02.233Z
The speed of the wind is not the crucial issue here. The present solar wind speed is a lot higher (several hundred km/sec). It is its density that would make all the difference (not to mention the vastly increased radiation intensity).
Thomas
CC BY-SA 4.0
2024-04-03T21:42:06.793Z
2024-04-03T21:42:06.793Z
Deko Revinio
<p>Because if the Sun expands to 1 AU or very close to it, its density and hold on outer layers will be much weaker so a dense object like the Earth can slowly absorb material because Earth would be much denser than the outermost regions and would the Earth become a gas giant from it?Would there be some iron in the outermost regions of the expanded sun which when falling onto Earth make the inner core bigger?</p>

CC BY-SA 4.0
2024-03-30T00:57:03.610Z
The Sun will not become a red giant for more than 7 billion years.
ProfRob
<the-sun><earth>
Will Earth become a gas giant when the Sun expands in 5 billion years?
MiltonTheMeme
# Will Earth become a gas giant when the Sun expands in 5 billion years?

(Asked by: username_0 on 2024-03-29)

Because if the Sun expands to 1 AU or very close to it, its density and hold on outer layers will be much weaker so a dense object like the Earth can slowly absorb material because Earth would be much denser than the outermost regions and would the Earth become a gas giant from it?Would there be some iron in the outermost regions of the expanded sun which when falling onto Earth make the inner core bigger?

**Tags:** the-sun, earth
> **Comments:**
> **username_1**: The Sun will not become a red giant for more than 7 billion years.  

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## 2 answers

### Answer by username_2 on 2024-03-29. Score: 11

The opposite. The Earth orbits at 30 km/s. The Sun's material would not have comparable net rotation, so the Earth would be subjected to a 30 km/s wind. This wind would easily strip off the Earth's atmosphere, and it would continue to strip any of the Sun's gas that got temporarily captured by the Earth.

Even without the wind, the temperature would likely be far too high for any gas to remain bound to the Earth, because the thermal velocities would exceed the Earth's escape velocity.

> **Comments:**
> **username_3**: Would a solar expansion to 1AU put enough resistance on earth that it would start to slow down and spiral into the sun?  
> **username_4**: Wouldn't the Earth's magnetic field cause the solar wind to strike the Earth directly causing Northern Lights instead of strip away the Earth's atmosphere?  
> **username_2**: @RussellHankins It depends on how much wind there is. Particles trapped in a magnetic field exert their own magnetic field in the opposite direction. With enough charged particles, the Earth's magnetic field would be completely counteracted.  
> **username_2**: @Questor Indeed, the earth would slow down gradually and, given enough time, sink into the sun. Not my field but, last I heard, this is the expected outcome.  
> **username_5**: The speed of the wind is not the crucial issue here. The present solar wind speed is a lot higher (several hundred km/sec). It is its density that would make all the difference (not to mention the vastly increased radiation intensity)  

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### Answer by username_6 on 2024-04-03. Score: 0

Funny you say that. Basically, **No.** Actually the *literal opposite* will happen.

As others have said, the wind caused by the expansion of the sun will be so incredibly fast (30 kilometers per **second**) that all gasses will be stripped away from our planet. The heat will also strip all of the gasses because of the thermal velocity being higher than earth's *escape velocity*. After that all happens, the sun will slowly slow it down before the planet corkscrews into the sun.

> **Comments:**
> **username_0**: Wouldn't a significant portion of the mass be in mars's orbit and jupiter's orbit?So the Earth once it expands back into a bigger orbit can absorb some of the mass. So maybe 3 Earths worth of hydrogen. So it will still gain mass right?  
> **username_6**: @MiltonTheMeme That'd be a good thing to do more research on. I didn't think of that, nice thought. :-)  
> **username_5**: The speed of the wind is not the crucial issue here. The present solar wind speed is a lot higher (several hundred km/sec). It is its density that would make all the difference (not to mention the vastly increased radiation intensity).  

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