Questions tagged [magnetic-field]

Questions regarding fields of magnetisms and their effects on Space Exploration, such as the Earth's magnetic field.

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1answer
105 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 "Variometers"....
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Is a magnetic field really needed to terraform Mars?

I see so many discussions about how the main roadblock to terraforming Mars is its lack of a magnetic field. If Mars had an atmosphere as thick as Earth's but no magnetic field, wouldn't it still take ...
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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? ...
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185 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?
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103 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 ...
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Could an articulated permanent magnet work as a low-power cubesat magnetotorquer? Problems?

Conventional magnetotorquers for cubesats are electromagnets that produce torque in the Earth's magnetic field, and nearly all of the power they use just heats the copper through $\text{I}^2 \text{R}$ ...
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964 views

Is the Paramagnetism of Liquid Oxygen Ever Considered in Engine or Tank Design?

NOTE: I'm asking if this material property is ever considered. I'm not asking "do you think it should be considered". I'm pretty sure someone has considered it, and I am hoping to track down some ...
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1answer
82 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 ...
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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 ...
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80 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 ...
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How does Mars have a Bow Shock and proton aurora? What is a hydrogen corona?

I just saw the NASA video Mars Proton Aurora below and I'm confused, (which by itself is unremarkable). Without a planetary magnetic field, what force produces a bow shock in the solar wind at Mars, ...
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2answers
415 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 ...
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How could an induced magnetosphere be created at Mars for terraforming?

In the long run Mars needs a magnetic field to keep a thick atmosphere and for radiation shielding, if humanity were to terraform it. Starting a dynamo in Mars' core seems forever impossible, but a ...
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601 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 ...
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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 ...
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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 ...
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220 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 ...
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Are magnetic boots in space practical?

I can't count how many science fictions stories I have read where someone is strapping on magnetic boots to walk in or on a space ship without gravity. How realistic of a solution is this? Just for ...
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2k views

Can you use magnets to travel through space?

My thought process is that there is very little friction in space minus gravitational pull. Which could be a good thing if you wanted to go faster or slow down. The question is, is it possible to ...
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What would be the optimal times and conditions to watch for to try to hear whistlers?

I have an NASA Inspire VLF-3 radio receiver kit that I'm going to put together. It amplifies VLF electromagnetic signals that are already in the audio frequency range and makes them audible. One of ...
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The Orbital Mass Accelerator Engine Theory

Can 2 satellites equal in weight traveling on the same orbital path in the opposite directions intersect and propel each other to gain altitude in orbit? Can orbital perturbation be negated during ...
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65 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?
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How would it be possible to kick start Mars's magnetic field?

Jumping from this question about terraforming Mars, how would one mitigate the main obstacle, namely Mars's lack of a magnetic field? Are there any hypothetical processes that might restart Mars's ...
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2answers
376 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 ...
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3answers
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Why can't permanent magnets be used for radiation shielding in space?

I've been reading a lot about concepts for protecting astronauts from Galactic Cosmic Radiation on interplanetary voyages. I've read about a lot of different ideas, but all of the ones involving a ...
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144 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 ...
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1answer
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Better understanding of the “Rivers of metallic hydrogen” in the atmosphere of Jupiter?

Between 03:00 and 05:00 in the BBC's radio program Giant hurricanes at Jupiter’s poles, BBC's science correspondent Jonathan ...
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What kind of antimatter engine is this?

I found this diagram while looking up diamagnetic machines. Could anyone explain what engine this is?
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Can the Sun's magnetic field be used to propel a solar satellite?

Can diamagnetic materials or a diamagnetic devise be used to propel using the magnetic field of the Sun in a solar polar magnetic assisted slingshot?
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323 views

What is the nature of a “flux tube” between Saturn and Enceladus, and what does “L‐shell=4” mean?

The NASA JPL YouTube video Sounds of Saturn: Hear Radio Emissions of the Planet and Its Moon Enceladus (below, also here) provides and audio and spectral representation of plasma waves recored by ...
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243 views

Could a spacecraft be propelled by the deflection of a very high number of charged particles?

I am wondering if a spacecraft could be propelled through interplanetary space via the deflection and/or displacement of a very high number of charged particles contained within the Sun's solar wind. ...
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Which objects in our solar system are naturally protected from solar flares?

Outside of Earth, are there any objects (planets, moons, asteroids) in our solar system that are naturally shielded from the radiation of solar flares and coronal mass ejections (CMEs)? Asked ...
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How possible is it to have a habitable planet with no moon like Earth has?

This article describes how Earth's Moon helps Earth's core remain liquid, thus maintaining our magnetic field. The magnetic field, in turn, protects life on Earth from radiation. To what extent is it ...
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Where are we in the current effort to make mars habitable? [closed]

I feel like this should be a massive effort put forth by all countries. As a civilization, our population is growing at a break-neck rate. Not only would it be a fail-safe should something happen to ...
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Can bad satellites be pulled out of orbit with an Orbital Mass Accelerator? [closed]

Could an Orbital Mass Accelerator OMA be used to knock other satellites out of orbit? Leaping from satellite to satellite using a magnetic field to accelerate some useless satellites and decelerate ...
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4answers
376 views

Accelerating spaceships via planetary magnetic fields

If traveling to distant planets in less time is an issue because of the fuel or speed, why can't we make use of a planet's magnetic field to accelerate ourselves given that almost all planets in our ...
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2answers
6k views

Place a satellite at Sun-Mars L1 to shield Mars from Sun radiation

Instead of placing many magnetic satellites close to Mars to artificially generate a magnetic field to protect Martian colonists from harming radiation, we could place a magnetic satellite at ...
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1answer
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Launching sounding rockets from the magnetic equator (ISRO's Thumba)

The Thumba Equatorial Rocket Launching Station is operated by ISRO for launching sounding rockets because magnetic equator passes through it. Equator gives additional velocity, But what advantage ...
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1answer
261 views

Effect of permanent magnet and solid core magnetorquer on magnetometer reading

Permanent magnet as passive stabilization and magnetorquer with solid core as active stabilization has been used over the year in satellites.But the would have magnetic field lines, wouldn't they ...
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How much power would a spacecraft's magnetic shield require?

I've read over the decades that a magnetic shield might protect a spacecraft from cosmic radiation. Its a fascinating idea that might only be theory or science fiction at the moment. In regards to ...
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2answers
1k views

Using Earth's magnetic field for an electric propulsion system

If you were to use a spacecraft built of copper in Earth's magnetic field, could you produce enough energy to propel yourself?
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Passive attitude stabilization with magnets - are there studies based on actual flight data?

Specifically with the small satellite and cubesat people, there is an rather 'old' idea around: Passive attitude stabilization based on permanent magnets. Schematic of the Earth magnetic field lines ...
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Have any space suits (not) used “pulsed magnetic devices”?

A currently trending question on Skeptics.se references a website that makes the claim that: In Yuri Gagarin’s historic flight to space, he returned in near critical condition after only one hour ...
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HPE's demo HPC system; why choose optical and not copper interconnects because of magnetic fields and radiation?

An article in The Next Platform, One Small Step Toward Supercomputers in Space describes a small High Performance Computing system (HPC) built by Hewlett Packard Enterprise (HPE), to be brought to the ...
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Are artificial magnetic fields used or proposed to be used to shield astronauts from charged, high energy radiation? [duplicate]

If not for the earth's magnetic field our atmosphere would be bombarded by high energy plasma (ionized gas) from the sun and other space sources. Much of these particles have more energy than the ...
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4answers
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Would terraforming Mars be possible?

Mars is a planet commonly brought up when talking about terraforming. Even if we were to manage to get past all economic barriers, and somehow form a thick atmosphere, would the lack of a magnetic ...
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1answer
981 views

How strong a magnetic field does Mars need to contain Earth-like atmosphere?

A quick follow-up to How would it be possible to kick start Mars's magnetic field? For example, the Venerean atmosphere is contained by merely an induced magnetic field. How powerful would ...
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What are the main problems with magneto plasma dynamic (MPD) thrusters?

Theoretically MPD thrusters can provide high thrust with extremely high specific impulse. What problems currently prevent this technology from being used in space exploration? Is there any planned ...
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1answer
87 views

Magnetic opposition for a launch boost [duplicate]

Just wondering since we are able to make an object seemingly float or neutrally gravity bouant, is it possible to create a launch pad where electromagnetism is used to "levitate" a vehicle (using ...
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1answer
156 views

Magnetic / Inductive braking against planetary magnetic fields?

I'm familiar with the concept of aerobraking. Consider an object like a star, or a planet with strong magnetic field (Earth, Jupiter, probably all of the gas/ice giants?) Could a probe use some kind ...