Questions tagged [solar-wind]

A supersonic flow of ionized particles emanating from the sun

Filter by
Sorted by
Tagged with
1
vote
1answer
24 views

Thermal velocity of electrons and protons in solar Corona

I would like to know how much (in eV) is the thermal velocity of electrons and protons in the lower solar corona? Thank you in advance!
0
votes
0answers
21 views

Other than magnitude what are the differences between CME's and Solar flares?

I could not understand the differences between a CME and a Solar flare, aside from the fact that they differ in magnitude.
1
vote
1answer
44 views

Energy spectrum of Solar energetic particles (SEP's)

I would like to know if we have obtained any observations regarding the energy spectrum of solar energetic particles. Something like the following histogram : And if so, what is the index of the ...
0
votes
1answer
35 views

How does the aurora brightness depend on the distance from the poles?

I checked a few sites about aurora: http://www.aurora-service.eu/aurora-school/all-about-the-kp-index/ https://www.swpc.noaa.gov/products/aurora-30-minute-forecast https://www.swpc.noaa.gov/products/3-...
0
votes
0answers
8 views

What would the chemical and atomic effects of an antimatter star be upon a normal matter artificial planetoid? (Thought experiment)

Setting aside all the challenges of actually achieving such a thing, and as a thought experiment, what would the chemical and atomic effects of an antimatter star be upon a normal matter artificial ...
0
votes
2answers
31 views

What would the effect of an antimatter star be upon a normal matter planet? (Thought experiment)

Based on the answers from this question: Would the solar wind from an antimatter star be any different from a non-antimatter star?, it seems that an antimatter Sol type star would conduct fusion ...
0
votes
3answers
52 views

Would the solar wind from an antimatter star be any different from a non-antimatter star?

Antimatter is any element of matter with an opposite charge than normal matter. As such, would an antimatter sun conduct fusion normally such that it would it radiate photons, or would it radiate ...
6
votes
1answer
60 views

What causes the vertical bands of light in an aurora?

I was lucky enough to witness a medium-strength aurora recently in Iceland (KP ~3). We saw the classic rippling arc of green light, which at times seemed to consist of smaller flickering vertical ...
3
votes
1answer
55 views

Will pyrolytic carbon/graphite repel the Sun's solar wind?

Since a moving charged particle has a magnetic field, as well as an electric field, and pyrolytic carbon/graphite repels an external magnetic field, would this mean that an object made out of ...
5
votes
2answers
169 views

How does the Earth's magnetic field protect it from the solar wind?

Several sources (see linked questions at the end) say that earth's magnetic field shields us from the solar wind. The general consensus is that without earth's magnetic field, the atmosphere would be ...
5
votes
1answer
117 views

Why the geomagnetic field become stronger when solar wind is stronger?

The following description is from the webpage of Niels Bohr Institue's Former Centre for Ice and Climate The Earth reacts to the solar wind by increasing the strength of the shielding magnetic ...
1
vote
0answers
29 views

Do solar energetic particles follow the Parker spiral?

I understand that the solar wind follows the Parker spiral shape of the Sun's magnetic field, thus it is possible for solar wind from a point on the opposite side of the Sun to reach Earth. I have ...
3
votes
2answers
63 views

Creating Aurora-like phenomenon in a laboratory

Is it possible to recreate Aurora's in a laboratory experiment? Obviously, I'm not asking if it's possible to have bands of plasma thousands of kilometers long inside a lab. But rather, is it possible ...
0
votes
0answers
57 views

Stable bubbles in a vacuum

I want to make space bubbles that hold some gaseous stuff - at very low pressure - for a long time and through nothing but surface tension. I can't use soap water as the water will evaporate quickly. ...
3
votes
1answer
59 views

How are solar sails maneuvered by sunlight? Are they pushed or pulled?

On 20 May, 2010, Japan launched IKAROS probe with primary propulsion by a solar sail. If the radiation pressure, that helps the sail to move, comes from the sun, then shouldn't it be pushed away from ...
2
votes
2answers
51 views

What is the solar wind speed as function of distance from the Sun?

Someone must have calculated at least a "zero-order approximation" of the behavior of solar wind speed, density, and pressure as a function of distance from the Sun, but the heck if I can find it. ...
1
vote
2answers
45 views

How does the energy of a solar flare propagate?

Does it radiate outward, spherically, or is it more directed? Is there some opening angle? Is it more complex than this?
3
votes
2answers
147 views

Colors of the Aurora

I've seen several web pages that attempt to explain the colours of the aurora but they seem to gloss over or leave out certain details, so I'm still confused. For example, this page explains it in ...
2
votes
1answer
146 views

Distortion of the Earth's magnetic field due to solar winds?

Why and how do the solar winds distort the Earth's Magnetosphere to form a drop like shape facing away from the Sun?
0
votes
1answer
340 views

Speed of sound at the Sun surface [closed]

The gas velocity at the Sun's surface is subsonic and At 1 AU from the sun, the solar wind is supersonic. Like Parker wind solution. Why the velocity at the Sun's surface is subsonic? (In the ...
1
vote
0answers
22 views

can a photons energy state be altered with magnetic force?

with respect to sunlight, is there any way to use a magnet to alter the energy impact of sunlight? more or less energy, or hotter vs cooler? All spectrums considered. visable, xray, gamma. Can a ...
6
votes
2answers
239 views

Shape of Earth's magnetic field

Why earth's magnetic field is compressed on day side and extended like tail on night side, like this I know that it's due to solar wind but not how that compression and extension happens.
2
votes
0answers
66 views

What portion of the total power emitted by the Sun comes from photons?

We usually talk about luminosity, which is the total power from emitted photons. The other sources are neutrinos and the solar wind (which includes protons and other particles). I assume that most ...
3
votes
1answer
94 views

Are North aurora and South aurora produced by positive and negative particles respectively?

Are North aurora and South aurora produced by positive and negative particles respectively?
0
votes
0answers
35 views

Electric field in frame corotating with sun

I am studying this paper on the solar wind for a class on MHD, but I am perplexed by the line that precedes equation (5): " But in a perfectly conducting fluid ${\bf v}$ is parallel to ${\bf B}$ in ...
2
votes
1answer
63 views

What's the timescale for the formation of a coronal mass ejection?

How quickly does the sun form and release a coronal mass ejection? If we were watching the right part of the sun closely, how long would it take us to go from "nothing seems to be happening" to "...
2
votes
1answer
49 views

Should there be a difference in strength or otherwise between daytime and nighttime auroras?

Or do they have exactly the same characteristics? I.e. if I observe them in a place where it’s dark 24 hours.
4
votes
2answers
115 views

What accelerates the solar wind?

The question is in the title. A bit of background info: the escape velocity at the photosphere of the Sun is ~ 620 km/s, but the mean speed of the solar plasma there (inferred from the temperature) ...
5
votes
2answers
693 views

What is the difference between bulk speed and thermal speed in solar wind plasma?

in solar wind plasma different species has different thermal speed but all having same bulk speed. why it is so? and in solar wind is the thermal speed is just the standard deviation around the bulk ...
4
votes
2answers
674 views

How would the Aurora light on Earth look like if there wasn't a magnetic field?

Here are some pictures of the aurora light. The beautiful phenomenon of Aurora is a well-known one, seen in the northern (Aurora Borealis) and southern parts (Aurora Australis) of the globe. Here is ...
2
votes
1answer
66 views

Solar Flares hitting Earth [duplicate]

When the earth is hit by solar flares, will it make the earth move faster through space when the magnetic field bends?
1
vote
1answer
48 views

Ion combination energies

This is somewhat out of my comfort zone, and therefore I may not be using the correct terminology. Basically, there are some promoters of a certain woo, that claim solar wind H+ can combine with O-. ...
2
votes
1answer
435 views

How long would it take Mars to lose its atmosphere if we gave it one?

I've read that one of the reasons Mars doesn't (any longer) have an atmosphere is that it loses more gas to the solar wind than the Earth does, because its core has solidified and it therefore lacks a ...
55
votes
8answers
12k views

Is it possible to send all nuclear waste on Earth to the Sun?

If we neglect the danger of unsuccessful lift-off of the rocket and the cost, would it be physically possible to send all nuclear waste on Earth to the Sun? Will there be an obstacle that prevents ...
3
votes
4answers
2k views

Do force fields physically exist?

Or are they just a region of space where the forces are acting around its source, for example a magnet? But if they are just regions, and not physical objects, then how can the Earth's magnetic field ...
2
votes
2answers
411 views

Solar prominence

I'm preparing for an upcoming school speech about solar flares and am wondering whether or not the "loop" in the following video is an example of "solar prominence" and what will eventually result in ...
6
votes
1answer
437 views

How does the 11-year solar cycle alter the cosmic ray flux?

Looking at a flux vs. time graph of secondary cosmic rays (e.g. from a neutron station: www.nmdb.eu/nest/search.php can plot you some. I just tried for example Moscow, from 14 Oct 1951 to today, ...
2
votes
0answers
1k views

Limitations of the ideal gas law: When does it fail?

Motivation I ask this question precisely because I am looking for a fundamental, quantitative explanation of the limitations of the ideal gas law and when it should not be used. Note, I have found ...
4
votes
1answer
258 views

Under which angles does the solar wind leave the Sun and arrive at it's desination?

As the sun emits charged particles outwards, those particles will travel long distances to reach far away points in the solar system. They could be influenced by other bodies, electromagnetic fields, ...
4
votes
1answer
217 views

Solar activity and radioactive decay rates [duplicate]

I recall hearing about this quite some time ago and thought it was very strange. I recently had it pop in my head again and was curious if anyone knew what was going on with this. Variable decay ...
3
votes
2answers
6k views

How strong is Earth's magnetic field in space?

I've been searching around Google and Youtube about the strength of Earth's magnetic field. By the help of wikipedia, I have found out that it's magnitude is 25 to 65 microtesla or 0.25 to 0.65 Gauss ...
2
votes
1answer
365 views

differences of Aurora Borealis (North) vs. Aurora Australis (South)

I was wondering about the differences between the Northern vs. Southern lights: will one pole collect the positive charges, and the other the negatives? I know that the solar wind is composed mainly ...
2
votes
1answer
91 views

Wind turbine impact on cars fuel consumption [closed]

I have question that I still can't resolve. How much cars fuel consumption rises(l/100km) if I attach 1 kW wind generator to cars body? How can I calculate that and what do I need to know? ...
3
votes
2answers
944 views

Possible Safe Areas In a Solar Flare

Which part of the earth would be the safest in case of the major solar flare? Will it be near equator or something like that?
9
votes
2answers
342 views

Does the solar wind correspond to a net electrical current?

The solar wind is a stream of ions emitted from the sun. Are there more positive than negative charges released? That is, is there any imbalance in the charge emitted from the sun in the solar wind?
11
votes
2answers
2k views

Do stars remain electrically neutral? [duplicate]

How electrically neutral do stars remain through their lifetime? As an example, I could imagine processes such as coronal mass ejections leaving the Sun in a slightly charged state. Are there such ...
4
votes
3answers
2k views

Why do charged particles follow magnetic field lines?

This may seem like a dumb question, but I can't think of the answer. The context I am curious about is the solar wind. Specifically particles flowing out of coronal holes and following the magnetic ...
1
vote
2answers
736 views

Can solar flares affect gravity?

Can a large eruption of solar flares on our sun change the effects of its gravity ever so slightly, and is it possible to measure these changes with the equipment we have today.
1
vote
1answer
99 views

How to calculate max temperature craft needs to withstand near the Sun

The Solar Probe Plus fact-sheet states that the craft will approach to the distance of 9 solar radii to the surface of the Sun (Approx 6.26e6 km) and its heat shields must withstand 1644K of heat. I ...
36
votes
4answers
4k views

Why doesn't the solar wind disrupt the planets?

The sun creates this heliosphere by sending a constant flow of particles and a magnetic field out into space at over 670,000 miles per hour, which is also known as solar wind. If the speed of the wind ...