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Author Topic: Why do we see no Northern lights/Auroras around the Sun?  (Read 4053 times)

Offline Thebox

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We observe Auroras in the Northern Hemisphere, and Auroras are caused by in short -

''The short answer to how the aurora happens is that energetic electrically charged particles (mostly electrons) accelerate along the magnetic field lines into the upper atmosphere, where they collide with gas atoms, causing the atoms to give off light.''

Google search.

An effect observed by an interaction of the Earth's magnetic field.

It is also said that the Sun has an electromagnetic field,

We also observe light from distant stars,

So if the Sun has an electromagnetic field, why do we not observe any Auroras around the Sun from where other light sources are emitting towards the Sun? 






 

Offline jccc

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Re: Why do we see no Northern lights/Auroras around the Sun?
« Reply #1 on: 17/05/2015 19:39:21 »
charged particles/electrons from other starts are not likely able to reach our sun, even they do, the auroras will be too weak to observe due to the brightness of the sun.
 

Offline Thebox

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Re: Why do we see no Northern lights/Auroras around the Sun?
« Reply #2 on: 17/05/2015 20:45:27 »
Ah thanks JCCC for the answer.
 

Offline evan_au

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Re: Why do we see no Northern lights/Auroras around the Sun?
« Reply #3 on: 17/05/2015 21:02:19 »
The STEREO spacecraft are able to observe the solar flares on the Sun that produce the auroras, and also to see the Coronal Mess Ejection on its way from the Sun to the Earth. These CMEs produce the most dramatic auroras - sometimes even seen near the equator.
 

Offline Thebox

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Re: Why do we see no Northern lights/Auroras around the Sun?
« Reply #4 on: 17/05/2015 21:16:07 »
The STEREO spacecraft are able to observe the solar flares on the Sun that produce the auroras, and also to see the Coronal Mess Ejection on its way from the Sun to the Earth. These CMEs produce the most dramatic auroras - sometimes even seen near the equator.

ar right thanks, what do these solar flares turn into when they vanish from observation?
 

Offline jccc

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Re: Why do we see no Northern lights/Auroras around the Sun?
« Reply #5 on: 17/05/2015 22:17:40 »
the impact force heats up air, produces light.

the particles absorbed by air or reformed into hydrogen atoms.

charge/mass and force/energy are conserved.

 

Online PmbPhy

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Re: Why do we see no Northern lights/Auroras around the Sun?
« Reply #6 on: 18/05/2015 05:37:30 »
We observe Auroras in the Northern Hemisphere, and Auroras are caused by in short -

''The short answer to how the aurora happens is that energetic electrically charged particles (mostly electrons) accelerate along the magnetic field lines into the upper atmosphere, where they collide with gas atoms, causing the atoms to give off light.''

Google search.

An effect observed by an interaction of the Earth's magnetic field.

It is also said that the Sun has an electromagnetic field,

We also observe light from distant stars,

So if the Sun has an electromagnetic field, why do we not observe any Auroras around the Sun from where other light sources are emitting towards the Sun?
Forget what jccc said. The aurora borealis is created by charged particles that are released from the sun and hit the earths magnetic field. All charged particles spiral around magnetic field lines and follow them to the poles. Charges that spiral around a field line are actually accelerating. Accelerating charged particles emit radiation. In this case the radiation is partially in the visible spectrum.

There's no reason to assume that this doesn't happen in the sun. When the sun emits a solar flare those particles are also charged and follow large loops. In essence that too is a sort of an Aurora. But no Aurora is "around" any body. The region its in is limited.
 

Offline Thebox

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Re: Why do we see no Northern lights/Auroras around the Sun?
« Reply #7 on: 18/05/2015 08:53:06 »
We observe Auroras in the Northern Hemisphere, and Auroras are caused by in short -

''The short answer to how the aurora happens is that energetic electrically charged particles (mostly electrons) accelerate along the magnetic field lines into the upper atmosphere, where they collide with gas atoms, causing the atoms to give off light.''

Google search.

An effect observed by an interaction of the Earth's magnetic field.

It is also said that the Sun has an electromagnetic field,

We also observe light from distant stars,

So if the Sun has an electromagnetic field, why do we not observe any Auroras around the Sun from where other light sources are emitting towards the Sun?
Forget what jccc said. The aurora borealis is created by charged particles that are released from the sun and hit the earths magnetic field. All charged particles spiral around magnetic field lines and follow them to the poles. Charges that spiral around a field line are actually accelerating. Accelerating charged particles emit radiation. In this case the radiation is partially in the visible spectrum.

There's no reason to assume that this doesn't happen in the sun. When the sun emits a solar flare those particles are also charged and follow large loops. In essence that too is a sort of an Aurora. But no Aurora is "around" any body. The region its in is limited.

Thank you Pm, I have seen in a few videos a solar flare being cast into space then vanish rather than looping around back to the sun by gravity.  What do these flares becomes,

charged particles like the solar winds?

a plasma gas?  like seen on earth in plasma research

Does it expand into nothing?

EMP?

« Last Edit: 18/05/2015 08:56:09 by Thebox »
 

Offline Colin2B

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Re: Why do we see no Northern lights/Auroras around the Sun?
« Reply #8 on: 18/05/2015 09:28:46 »
If you remain in the sane zone I'm happy to answer:

Thank you Pm, I have seen in a few videos a solar flare being cast into space then vanish rather than looping around back to the sun by gravity.  What do these flares becomes,

charged particles like the solar winds?
Yes

a plasma gas?  like seen on earth in plasma research
Close in to sun, yes

Does it expand into nothing?
No, but it can dissipate - spread out so thinly that the effect is small.

EMP?
It can create an EMP.

I don't recommend wiki for leading edge topics, and some other articles only scratch the surface, but for some subjects itis quite good. You could try this, but be aware it mentions things you don't believe in!
http://en.m.wikipedia.org/wiki/Solar_flare
 

Offline Thebox

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Re: Why do we see no Northern lights/Auroras around the Sun?
« Reply #9 on: 18/05/2015 09:48:09 »
If you remain in the sane zone I'm happy to answer:

Thank you Pm, I have seen in a few videos a solar flare being cast into space then vanish rather than looping around back to the sun by gravity.  What do these flares becomes,

charged particles like the solar winds?
Yes

a plasma gas?  like seen on earth in plasma research
Close in to sun, yes

Does it expand into nothing?
No, but it can dissipate - spread out so thinly that the effect is small.

EMP?
It can create an EMP.

I don't recommend wiki for leading edge topics, and some other articles only scratch the surface, but for some subjects itis quite good. You could try this, but be aware it mentions things you don't believe in!
http://en.m.wikipedia.org/wiki/Solar_flare

Thank you for the answers,
''No, but it can dissipate - spread out so thinly that the effect is small.''

an effect as small as EMR?

or a CBMR?

or a plasma aether?

and why does the Sun not just dissipate like any other self respecting plasma?
« Last Edit: 18/05/2015 09:50:30 by Thebox »
 

Offline Colin2B

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Re: Why do we see no Northern lights/Auroras around the Sun?
« Reply #10 on: 18/05/2015 11:10:39 »

an effect as small as EMR?

or a CBMR?

or a plasma aether?

and why does the Sun not just dissipate like any other self respecting plasma?
EMR? I thought we were taking EMP which can be very large, but it still obeys the laws of physics eg inverse square law.

Where did CMBR come into this?

What is a plasma aether??? I think I'm going to be sorry I asked.

"and why does the Sun not just dissipate like any other self respecting plasma?"

Just take a moment to think  rather than react off the top of your head. A few moments of imagination will tell you why not.
 

Offline Thebox

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Re: Why do we see no Northern lights/Auroras around the Sun?
« Reply #11 on: 18/05/2015 12:17:08 »

Just take a moment to think  rather than react off the top of your head. A few moments of imagination will tell you why not.

Magnetic bottling or centripetal force?
 

Offline Colin2B

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Re: Why do we see no Northern lights/Auroras around the Sun?
« Reply #12 on: 18/05/2015 14:19:28 »
Magnetic bottling or centripetal force?
Which of those 2 do you thinks is most likely?
 

Offline evan_au

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Re: Why do we see no Northern lights/Auroras around the Sun?
« Reply #13 on: 18/05/2015 22:28:43 »
Quote from: TheBox
why does the Sun not just dissipate like any other self respecting plasma?
As implied, it is very hard to contain a plasma (contained nuclear fusion research has been going for 50 years, and we still don't have a production-quality reactor).

However, the Sun has a powerful containment field - it's massive* gravitational field. This holds the plasma together, and provides the pressures at the center that can initiate and sustain nuclear fusion.

*Note: This is the vernacular meaning of "Massive", not the "Physics" definition.
« Last Edit: 18/05/2015 22:31:59 by evan_au »
 

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Re: Why do we see no Northern lights/Auroras around the Sun?
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