Questions tagged [magnetic-field]
Questions regarding fields of magnetisms and their effects on Space Exploration, such as the Earth's magnetic field.
110
questions
0
votes
1
answer
76
views
How to select the right magnetic torquers to desaturate a wheel?
I want to select actuators for a micro-satellite (around 40 kg) orbiting in LEO.
I proceeded in calculating the maximum disturbance torques that affect my spacecraft and selecting proper reaction ...
2
votes
1
answer
215
views
Is Electromagnetic Propulsion Like Radiation Pressure propulsion?
while browsing for new propulsion methods I found the following interesting:
https://en.wikipedia.org/wiki/Radiation_pressure
"Radiation pressure (also known as light pressure) is the mechanical ...
- 41
1
vote
0
answers
82
views
How do I simulate a magnetometer and get an attitude?
I consider that I have a single magnetometer (i don't know if I need more), how can I model that sensor? This was my idea:
Consider a random unit length vector $\textbf{m}$ which is the magnetic field ...
- 23
6
votes
1
answer
254
views
Can we use magnets to land a spaceship (Starship)?
Can we use magnets to land a spaceship (Starship)?
We could give the landing legs a magnetic flat surface or something and then the controller can reduce the magnetic strength or in other words, ...
1
vote
2
answers
141
views
How to calculate the force applied by a magnetorquer on a piece of a perfect ferromagnetic material?
How to calculate the force applied by a magnetorquer on a piece of a perfect ferromagnetic material at a particular distance in vacuum given that I know the actuatuon (in Am2)
https://www.isispace.nl/...
4
votes
0
answers
38
views
How many solar system bodies have had their magnetic fields directly measured?
Discussion below this post lead me to wonder:
Question: How many solar system bodies have had their magnetic fields directly measured?
Inferences from radio or spectroscopic observations don't count ...
- 149k
4
votes
1
answer
136
views
Would it be possible to use a electrodynamic tether or similar device on or within Europa to generate electricity from Jupiter's magnetosphere?
I was reading about the idea of using an electrodynamic tether to generate electricity for satellites in Earth's orbit using the planet's magnetic field, generating electricity but gradually lowering ...
- 41
-1
votes
1
answer
150
views
Why is Aurora Australis less popular? [closed]
The Aurora Borealis(Northern Lights), in the North, gets more publicity, than the (Southern Lights) Aurora Australis, Why is it so?
- 171
1
vote
0
answers
32
views
Why exactly did SOLRAD 1 have a magnet? Why weren't its interactions with Earth's magnetic field anticipated?
Wikipedia's SOLRAD_1; Scientific results says:
The satellite communicated results in real-time, which meant that data could only be received when there was a tracking station within range – either ...
- 149k
23
votes
5
answers
7k
views
Why doesn't the ISS orient itself to the Earth's magnetic field like a compass needle?
I was watching this video of a magnet aboard the ISS floating freely. When the person lets go of the magnet, it behaves like a compass needle and immediately orients itself to the magnetic field of ...
- 1,584
6
votes
1
answer
387
views
How long would a magnetic shield placed at the Mars L1 point take to replenish Mars's atmosphere?
This conference paper proposes placing a magnetic shield at the Mars L1 point to protect it's atmosphere. The paper reports the results of modeling the martian atmosphere at a variety of pressures (10,...
- 331
4
votes
0
answers
119
views
Why is it that harmful for astronauts and technology to get too far into Jupiter's magnetosphere? Shouldn't it rather be protective?
Jupiter's radiation belts make it impossible for astronauts to stay on Io, Europa and Ganymede over extended periods of time, as well as getting too close to Jupiter at all. I wonder how close would ...
- 633
5
votes
2
answers
193
views
Has any rover dragged a magnet across any solar system body to see what gets picked up or made magnetic measurements of specific rocks or particles?
On Earth, amateur and sometimes professional scientists collect dust from the tops of buildings or mountains (see also) and separate it with a magnet to obtain meteoric material. Not all meteoric ...
- 149k
3
votes
0
answers
51
views
Could a Mars rover reliably navigate using the local magnetic fields?
Mars does not have a global magnetic field which guides charged particles entering the atmosphere. Mars has multiple umbrella-shaped magnetic fields mainly in the Southern Hemisphere, which are ...
- 47.7k
1
vote
0
answers
39
views
Calculating angular deviation from LEO magnetic field
The situation
I need to calculate pointing errors for a satellite that points along Earth's magnetic field. The satellite's position and orientation are given to me w.r.t ECI J2000. The orientation is ...
3
votes
0
answers
108
views
Why are Hubble's magnetorquers angled?
Watching a video on how Hubble attitude control works I saw one portion on magnetorquers. It has four for redundancy but they are angled in a way that looks awkward from a packaging viewpoint, so what ...
- 344
2
votes
0
answers
44
views
Active magnetic protection against cosmic radiation - Can anyone provide articles or summarize the latest developments?
A European project purports to have a practical magnetic shield for cosmic rays, based on four MgB2 toroidL coils1 oriented around the spacecraft like the lines of longitude around the globe. I can't ...
- 179
1
vote
1
answer
375
views
Earth magnetic field vector in ECEF
I've this problem...
I want to express the earth magnetic field vector in ECEF reference frame. As now I've just found some models for computing these values related to the earth magnetic field:
D: ...
- 11
4
votes
1
answer
224
views
Could artificial magnets orbiting the sun be used to accelerate spacecraft, like a magnetic "gravity" assist?
Say there's a powerful magnet in an orbit between those of Earth and Mars. Could a spacecraft traveling between those planets save propellant by performing a slingshot maneuver using its magnetic ...
14
votes
1
answer
2k
views
Why did the data "go wild" when Ulysses entered Hyakutake's tail?
The following statement is from @OrganicMarble's answer to this question "How hard is it to fly through the tail of a comet? Has it been done?":
On May 1, 1996, while Ulysses was cruising ...
- 1,015
0
votes
1
answer
196
views
Can a spacecraft be propelled by two electromagnets of different size? [duplicate]
I watched a video of a toy car moving with 2 magnets, one bigger than the other. The answer I received was that the video was real, the toy car indeed moves.
So, I was wondering, if an object with 2 ...
- 91
1
vote
2
answers
124
views
Magnetometer in space
See, i recently buy a magnetometer to experiment with arduino, i want start building a litle fly computer for a cubesat (this cubesat have an ion engine, so, have thrust).
I start reading the Azimuth ...
- 1,633
4
votes
1
answer
336
views
When the magnetic poles of the Sun flip (once in 11 years), is the Earth hit by more galactic cosmic rays?
The Sun protects us from cosmic rays from beyond the solar system. Every 11 years, the Sun's poles reverse.
Solar cosmic rays are greatest during the reversal.
During the reversal, are we hit by more ...
1
vote
0
answers
76
views
I've looked at the Science involved but have doubts this would work, how can you generate momentum with-in a sealed system to produce propulsion? [closed]
Could you use a magnetic super-capacitor compound which is charged so it gains the maximum amount of weight\mass then is pushed away from the main object down a chamber using a magnetic field. As the ...
- 11
1
vote
0
answers
25
views
Theories Clarification
I attended a seminar and the presenter was discussing various theories to explain the strong magnetic anomalies on Mars as spotted from orbit. One theory was that the "Lithology is rich in ...
1
vote
0
answers
27
views
magnitude of magnetic anomalies (Earth and Mars)
I've been looking for the magnitude of highest and lowest magnetic anomalies on Earth and Mars (mapped by spacecraft in low orbit), by searching online I couldn't really find a numerical value. From ...
2
votes
0
answers
125
views
Magnetic braking for interplanetary journeys?
One proposed use for a magnetic sail is to allow an interstellar spacecraft to brake as it approaches its destination. But could a magnetic sail also slow down a spacecraft traveling between planets? ...
- 1,196
4
votes
2
answers
146
views
Ramscoop for a space station or lunar base?
From what I've read, the Bussard ramscoop has problems which make it impractical as a means of propulsion. However, would it be possible to use it for a different purpose? Could a space station or ...
- 1,196
4
votes
1
answer
129
views
Possible explanations to Mars' exceptionally strong magnetic anomalies
Some of the magnetic anomalies spotted in the southern hemisphere of Mars from orbit are exceptionally high in magnitude and they are an order of magnitude greater than what we would expect ...
1
vote
1
answer
72
views
Possible explanations to a negative correlation between iron (Ferromagnetic) and magnetic field observations from orbit
When looking at magnetic field observation of a planet with no current magnetic field, we can observe magnetic anomalies, which is basically when ferromagnetic minerals acquire remanent magnetization ...
2
votes
0
answers
111
views
What was Steve? Is it called something else now?
"Steve" was a temporary name for a space phenomenon above the Earth. Since then it's likely much work as been done and a more permanent name chosen. So I'd like to ask what Steve really was/is, and if ...
- 149k
5
votes
1
answer
546
views
Why must "Mercury’s core (be) partially molten" to explain its weak magnetism?
EarthSky.org's Top 5 Mercury mysteries that BepiColombo will solve says:
Why does Mercury have a magnetic field?
Not too many planets have a magnetic field. Among the rocky planets of the inner ...
- 149k
3
votes
1
answer
301
views
Can a strong magnetic field be used to propel a spacecraft towards Mars and outer planets in Solar system?
Sun is bombarding us with ionized particles and these particles are moving towards outer planets. During solar flares this effect is intensified greatly. If we are able to create very strong magnetic ...
- 2,223
2
votes
1
answer
689
views
How strong is Sun magnetic field on Moon surface? And on Mars?
I wan to calculate the voltage difference generated by sun EM Field on a wire placed on Moon or Mars surface, but I can't find consistent data about solar EM Field.
I found different values:
The ...
- 3,023
2
votes
0
answers
120
views
How strong would a magnetic field have to be to protect interplanetary craft?
The following suggests that this is a possible idea to protect crew on interstellar space flight:
Is NASA doing research on "mini-magnetospheres" to protect crew from radiation in space?
...
- 121
3
votes
1
answer
354
views
How could Earth's magnetic field be used to determine a cubesat's attitude in LEO?
After reading this answer I thought that I'd read about a smallsat that used magnetometers to measure the Earth's magnetic field direction and magnitude along with a model for Earth's field and some ...
- 149k
1
vote
1
answer
280
views
How were Venera's variometers able to measure extremely weak, nano-Tesla magnetic fields?
The image below is from the really interesting page Inventing The Interplanetary Probe (linked by @A.Rumlin here).
Above the fluxgate magnetometer there is a pair of short tubes labeled "...
- 149k
2
votes
1
answer
161
views
Could man-made, magnetic shields protect us from from sun's energetic particles from coronal mass ejections?
I read this in a published scholarly article: "...deploying a magnetic shield could enhance Mars' atmosphere and facilitate crewed missions there in the future..." It made me wonder if it is possible ...
- 21
1
vote
0
answers
113
views
Is tidal-lock associated with lack of geothermal activity?
This question mainly stems from the inconvenient datum that is Venus.
I was long under the impression that liquid mantle and core of a planet was tied to the mass of the planet (except perhaps where ...
- 287
7
votes
1
answer
178
views
What, if any, effect does the Martian magnetic field have on dust storms?
Since we know most dust particles on Mars are magnetic, I was wondering if they might be affected by the Martian magnetic field.
Can the Martian magnetic field have any effect on the spatial ...
- 71
3
votes
3
answers
572
views
Are geostationary orbits impacted by changes to earths magnetic field?
Would geostationary satellites be pushed to different orbits by changes in the magnetic filed or even more so by shifting poles or even a reversal?
- 133
2
votes
1
answer
2k
views
Do GPS satellites use the earth's magnetic field in any way?
There's a lot of speculation about how changes or flips in the Earth's magnetic field would affect us, our machines, and sea turtles.
I'm curious about the GPS satellites themselves. In one way they ...
- 850
5
votes
1
answer
323
views
Where do ion propulsion's ions go? Do they remain in the solar system or shoot out into interstellar space?
Writing this answer has got me thinking.
You can estimate the exhaust velocity of an ion engine using
$$\frac{v}{c} = \sqrt{\frac{2E}{m_0 c^2}}. $$
Choose $E=$ 100 keV and $m_0 c^2=$ 931 MeV times ...
- 149k
0
votes
0
answers
56
views
Why don't astronauts/ships/stations carry portable 'magnetospheres'? [duplicate]
As I understand it, cosmic radiation is one of the biggest dangers/problems to space exploration. Some cursory research seems to suggest that it wouldn't take very strong magnetic fields to deflect ...
- 109
1
vote
1
answer
541
views
Can it be realistic to build a artificial magnetic field around Mars? [duplicate]
I was wondering how realistic it is to build an artificial magnetic field around Mars using electromagnetism.
So my question is; what kind of current would be needed in a loop around Mars' equator to ...
- 113
2
votes
0
answers
72
views
Can a spaceship land on a strongly magnetic planet? [closed]
What would happen to a spaceship if it tried to land on a planet that had a magnetic field as strong as Jupiter's?
2
votes
2
answers
672
views
Can objects be deorbited by a satellite using a magnetic field?
Can a magnetic field be made around a satellite for a split second to gain or loose momentum from another satellite or debris with a few passes with a near-miss trajectories on larger debris? Could a ...
- 1
3
votes
2
answers
749
views
Artificial Magnetosphere to Terra-form Mars?
I was reading a 2017 article on a potential that Mars could be terraformed using a magneto-tail; A Future Mars Environment for Science and Exploration. This would basically entail sticking a giant ...
- 9,377
5
votes
2
answers
2k
views
What kind of antimatter engine is this?
I found this diagram while looking up diamagnetic machines. Could anyone explain what engine this is?
- 1
2
votes
0
answers
153
views
Would a flat superconductor create surface area to increase its diamagnetic field uni or bilaterally to propel in space? [closed]
Instead of using a standard solar sail material could the sail be built of diamagnetic material and sail faster? Is there a way to make a thin flat sail that both uses the dimagnetic properties of a ...
- 1