Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > sci.physics > #622125 > unrolled thread
| Started by | Yousuf Khan <bbbl67@spammenot.yahoo.com> |
|---|---|
| First post | 2017-03-08 07:42 -0500 |
| Last post | 2017-03-08 10:38 -0800 |
| Articles | 17 on this page of 57 — 15 participants |
Back to article view | Back to sci.physics
NASA proposes artificial magnetic field to make Mars a second home Yousuf Khan <bbbl67@spammenot.yahoo.com> - 2017-03-08 07:42 -0500
NASA proposes artificial magnetic field to make Mars a second home john <johnsefton288@gmail.com> - 2017-03-08 05:09 -0800
Re: NASA proposes artificial magnetic field to make Mars a second home S Ergio <invlid@invalid.com> - 2017-03-08 08:16 -0600
Re: NASA proposes artificial magnetic field to make Mars a second home Yousuf Khan <bbbl67@spammenot.yahoo.com> - 2017-03-08 11:40 -0500
Re: NASA proposes artificial magnetic field to make Mars a second home S Ergio <invlid@invalid.com> - 2017-03-08 11:51 -0600
Re: NASA proposes artificial magnetic field to make Mars a second home Yousuf Khan <bbbl67@spammenot.yahoo.com> - 2017-03-08 22:44 -0500
Re: NASA proposes artificial magnetic field to make Mars a second home The Starmaker <starmaker@ix.netcom.com> - 2017-03-08 23:36 -0800
Re: NASA proposes artificial magnetic field to make Mars a second home john <johnsefton288@gmail.com> - 2017-03-09 00:37 -0800
Re: NASA proposes artificial magnetic field to make Mars a second home Odd Bodkin <bodkinodd@gmail.com> - 2017-03-09 06:28 -0600
Re: NASA proposes artificial magnetic field to make Mars a second home john <johnsefton288@gmail.com> - 2017-03-09 05:47 -0800
Re: NASA proposes artificial magnetic field to make Mars a second home Odd Bodkin <bodkinodd@gmail.com> - 2017-03-09 08:24 -0600
Re: NASA proposes artificial magnetic field to make Mars a second home benj <benj@nobody.net> - 2017-03-09 18:22 -0500
Re: NASA proposes artificial magnetic field to make Mars a second home The Starmaker <starmaker@ix.netcom.com> - 2017-03-09 10:07 -0800
Re: NASA proposes artificial magnetic field to make Mars a second home S Ergio <invlid@invalid.com> - 2017-03-09 08:47 -0600
Re: NASA proposes artificial magnetic field to make Mars a second home "Rodney Pont" <mlist4@infohit.me.uk> - 2017-03-09 16:21 +0000
Re: NASA proposes artificial magnetic field to make Mars a second home S Ergio <invlid@invalid.com> - 2017-03-09 10:50 -0600
Re: NASA proposes artificial magnetic field to make Mars a second home john <johnsefton288@gmail.com> - 2017-03-09 09:13 -0800
Re: NASA proposes artificial magnetic field to make Mars a second home Odd Bodkin <bodkinodd@gmail.com> - 2017-03-09 13:17 -0600
Re: NASA proposes artificial magnetic field to make Mars a second home john <johnsefton288@gmail.com> - 2017-03-09 12:08 -0800
Re: NASA proposes artificial magnetic field to make Mars a second home Odd Bodkin <bodkinodd@gmail.com> - 2017-03-09 14:24 -0600
Re: NASA proposes artificial magnetic field to make Mars a second home S Ergio <invlid@invalid.com> - 2017-03-09 15:45 -0600
Re: NASA proposes artificial magnetic field to make Mars a second home S Ergio <invlid@invalid.com> - 2017-03-09 15:47 -0600
Re: NASA proposes artificial magnetic field to make Mars a second home john <johnsefton288@gmail.com> - 2017-03-09 14:24 -0800
Re: NASA proposes artificial magnetic field to make Mars a second home S Ergio <invlid@invalid.com> - 2017-03-09 17:14 -0600
Re: NASA proposes artificial magnetic field to make Mars a second home benj <benj@nobody.net> - 2017-03-09 18:42 -0500
Re: NASA proposes artificial magnetic field to make Mars a second home "Rodney Pont" <mlist4@infohit.me.uk> - 2017-03-09 19:04 +0000
Re: NASA proposes artificial magnetic field to make Mars a second home S Ergio <invlid@invalid.com> - 2017-03-09 15:31 -0600
Re: NASA proposes artificial magnetic field to make Mars a second home "Rodney Pont" <mlist4@infohit.me.uk> - 2017-03-10 05:43 +0000
Re: NASA proposes artificial magnetic field to make Mars a second home Yousuf Khan <bbbl67@spammenot.yahoo.com> - 2017-03-10 01:42 -0500
Re: NASA proposes artificial magnetic field to make Mars a second home Yousuf Khan <bbbl67@spammenot.yahoo.com> - 2017-03-09 21:37 -0500
Re: NASA proposes artificial magnetic field to make Mars a second home "Rodney Pont" <mlist4@infohit.me.uk> - 2017-03-10 05:38 +0000
Re: NASA proposes artificial magnetic field to make Mars a second home Yousuf Khan <bbbl67@spammenot.yahoo.com> - 2017-03-10 01:51 -0500
Re: NASA proposes artificial magnetic field to make Mars a second home "Rodney Pont" <mlist4@infohit.me.uk> - 2017-03-10 07:21 +0000
Re: NASA proposes artificial magnetic field to make Mars a second home Yousuf Khan <bbbl67@spammenot.yahoo.com> - 2017-03-10 08:24 -0500
Re: NASA proposes artificial magnetic field to make Mars a second home john <johnsefton288@gmail.com> - 2017-03-10 07:25 -0800
Re: NASA proposes artificial magnetic field to make Mars a second home Odd Bodkin <bodkinodd@gmail.com> - 2017-03-10 09:29 -0600
Re: NASA proposes artificial magnetic field to make Mars a second home Serg io <invalid@invalid.com> - 2017-03-10 14:57 -0600
Re: NASA proposes artificial magnetic field to make Mars a second home benj <nobody@gmail.com> - 2017-03-10 21:12 -0500
Re: NASA proposes artificial magnetic field to make Mars a second home Serg io <invalid@invalid.com> - 2017-03-10 20:33 -0600
Re: NASA proposes artificial magnetic field to make Mars a second home john <johnsefton288@gmail.com> - 2017-03-11 05:19 -0800
Re: NASA proposes artificial magnetic field to make Mars a second home Serg io <invalid@invalid.com> - 2017-03-11 07:50 -0600
Re: NASA proposes artificial magnetic field to make Mars a second home john <johnsefton288@gmail.com> - 2017-03-11 07:08 -0800
Re: NASA proposes artificial magnetic field to make Mars a second home Odd Bodkin <bodkinodd@gmail.com> - 2017-03-11 13:54 -0600
Re: NASA proposes artificial magnetic field to make Mars a second home noTthaTguY <abu.kuanysh05@gmail.com> - 2017-03-12 18:05 -0700
Re: NASA proposes artificial magnetic field to make Mars a second home Alan Folmsbee <omnilobe@gmail.com> - 2017-03-12 22:52 -0700
Re: NASA proposes artificial magnetic field to make Mars a second home Dr J R Stockton <reply1700@merlyn.demon.co.uk.invalid> - 2017-03-11 21:54 +0000
Re: NASA proposes artificial magnetic field to make Mars a second home john <johnsefton288@gmail.com> - 2017-03-11 22:43 -0800
Re: NASA proposes artificial magnetic field to make Mars a second home Serg io <invalid@invalid.com> - 2017-03-12 11:52 -0500
Re: NASA proposes artificial magnetic field to make Mars a second home Alan Folmsbee <omnilobe@gmail.com> - 2017-03-12 10:20 -0700
Re: NASA proposes artificial magnetic field to make Mars a second home Serg io <invalid@invalid.com> - 2017-03-12 13:33 -0500
Re: NASA proposes artificial magnetic field to make Mars a second home Alan Folmsbee <omnilobe@gmail.com> - 2017-03-12 13:30 -0700
Re: NASA proposes artificial magnetic field to make Mars a second home Serg io <invalid@invalid.com> - 2017-03-12 18:22 -0500
Re: NASA proposes artificial magnetic field to make Mars a second home Otplate Yuugaku <yu@yotwaglwt.pa> - 2017-03-08 15:32 +0000
Re: NASA proposes artificial magnetic field to make Mars a second home Otplate Yuugaku <yu@yotwaglwt.pa> - 2017-03-08 15:52 +0000
Re: NASA proposes artificial magnetic field to make Mars a second home "reber G=emc^2" <herbertglazier0@gmail.com> - 2017-03-08 09:17 -0800
Re: NASA proposes artificial magnetic field to make Mars a second home "hanson" <hanson@quick.net> - 2017-03-08 12:43 -0800
Re: NASA proposes artificial magnetic field to make Mars a second home The Starmaker <starmaker@ix.netcom.com> - 2017-03-08 10:38 -0800
Page 3 of 3 — ← Prev page 1 2 [3]
| From | Serg io <invalid@invalid.com> |
|---|---|
| Date | 2017-03-11 07:50 -0600 |
| Message-ID | <oa0vc6$d8q$1@gioia.aioe.org> |
| In reply to | #622512 |
On 3/11/2017 7:19 AM, john wrote: > Mars is no longer close enough to the sun. > The Solar Wind gradually pushes all > planets away. > Venus is next up, but it's still too hot. > We're just going to have to figure out > how to live within our planetary means > for now. > the Moon is a lot closer ! And the *Moon is just like Mars*, no water, no food, no gasoline, no air, no nothing and the Moon Needs a big Magnet. Headgear containing Magnets will be issued to each moon goer. remember folks, if they are talking about going to Mars, they are only trying to get federal funding.
[toc] | [prev] | [next] | [standalone]
| From | john <johnsefton288@gmail.com> |
|---|---|
| Date | 2017-03-11 07:08 -0800 |
| Message-ID | <afaa91e5-2e5f-4615-8f0f-1de25d6f0441@googlegroups.com> |
| In reply to | #622513 |
Let's see them try to get to the moon in real life
[toc] | [prev] | [next] | [standalone]
| From | Odd Bodkin <bodkinodd@gmail.com> |
|---|---|
| Date | 2017-03-11 13:54 -0600 |
| Message-ID | <oa1klr$1m5u$3@gioia.aioe.org> |
| In reply to | #622515 |
On 3/11/2017 9:08 AM, john wrote: > Let's see them try to get to the moon > in real life > I believe that Elon Musk is sending two passengers up to orbit the moon next year. All you need is money for a ticket, John. You claim to be healthy enough. That way, you can see for yourself by first-hand experience whether it is possible. That may be the only way you'd ever be convinced. But then again, some people would avoid doing this so that they don't ever get convinced. -- Odd Bodkin -- maker of fine toys, tools, tables
[toc] | [prev] | [next] | [standalone]
| From | noTthaTguY <abu.kuanysh05@gmail.com> |
|---|---|
| Date | 2017-03-12 18:05 -0700 |
| Message-ID | <94eb5549-fbd6-45ab-b3bd-b009c07441a0@googlegroups.com> |
| In reply to | #622223 |
hm, makes y'go > Actually the magnetic field strength drops away by a factor of inverse > cubed not inverse squared. But it really doesn't matter how strong the > magnetic field is at the surface of Mars, just so long as it's ahead of > Mars and it produces a large enough bow shock pattern, similar to how > the bow shock pattern is produced ahead of Earth, diverting the solar > wind away from Earth. > > > how much fuel on board with the sattilite need to compensate for pushing > > particals around? > > Don't know, perhaps they'll find a clever way to use the magnetic field > itself as a propulsion tool to keep it stable in the L1? > > > Gamma rays are not deflected and come in at full strength to the ground, > > on earth the atmosphere protects us from 95% of them. so how much gamma > > can a crew take ? a year or two ? > > The magnetic field doesn't protect against any kind of EM radiation, no > matter what. All it protects against is the solar winds. This in turn > creates a shield of the upper atmosphere to protect against the high > energy photons from penetrating into the lower atmosphere. > > Fortunately, gamma rays are usually an uncommon type of photons in the > universe, as most of the gamma rays occur inside the cores of stars > during nuclear fusion, and they all get diffused into lower energy > photons by the time they exit the star's photosphere. Most sources of > raw gamma rays are things such as supernovas and quasars, and those are > very directional in their nature. Another advantage is that these > sources of gamma rays are also pretty distant. > > > and again, to cosmic rays, at what angle can they be deflected from > > orgional their path, using a magnetic field, is it only 1 or 2 degrees ? > > Earth's magnetic field doesn't stop cosmic rays either, they tend to hit > the Earth relatively unopposed. Again fortunately due to the fact that > cosmic rays are high energy particles produced by supernovas and active > galactic nuclei, they are relatively rare. Most of the cosmic rays are > diverted by the Sun's magnetic field rather than any single planet's > (though Jupiter's might be strong enough to divert some too). > > Most cosmic rays are travelling at relativistic speeds, so no puny > magnetic field short of a magnetar is going to do much to divert any > cosmic rays. We used to use cosmic ray showers in the atmosphere to > detect new particles, prior to the advent of supercolliders.
[toc] | [prev] | [next] | [standalone]
| From | Alan Folmsbee <omnilobe@gmail.com> |
|---|---|
| Date | 2017-03-12 22:52 -0700 |
| Message-ID | <16f1ad4c-b246-4264-a5e0-37380111a9c1@googlegroups.com> |
| In reply to | #622734 |
I made a calculation for a shield. A current will loop around Mars using two moons. Each moon is charged with 5 Coulombs at a trillion volts. That generates 10^-17 Tesla for the B field in some regions near Mars. That is too weak, compared to Earth's 10^-6 Tesla.
[toc] | [prev] | [next] | [standalone]
| From | Dr J R Stockton <reply1700@merlyn.demon.co.uk.invalid> |
|---|---|
| Date | 2017-03-11 21:54 +0000 |
| Message-ID | <ttoC+NuLIHxYFwkx@invalid.uk.co.demon.merlyn.invalid> |
| In reply to | #622134 |
In sci.astro message <o9p3o5$1gve$1@gioia.aioe.org>, Wed, 8 Mar 2017 08:16:28, S Ergio <invlid@invalid.com> posted: >On 3/8/2017 6:42 AM, Yousuf Khan wrote: >> http://www.zdnet.com/article/nasa-proposes-artificial-magnetic-field- >>to-make-mars-a-second-home/ >>> Green proposes that by placing a magnetic dipole shield at the Mars L1 >>> Lagrange Point, a man-made magnetosphere sphere would cradle the >>> entire planet. Sort of. The dipole would shield the dayside of the atmosphere of Mars from the solar wind. By the way, in the past, at least some respected authors called L1 "L2" and L2 "L1". The proposal is not by Green; it is by Green /et al/. >how far away is Mars L1 Lagrange Point from Mars ? >about 141,000,000 miles. Very wrong. >how does magnetic field strength decline with distance ? >1/d^2 ? For that, you need a monopole source. Point-dipole fields go as d^-3. >so you need a magnet of at least 2*10^16 telsa ? ? The field strength at the magnet is of itself not important. It is the dipole moment which creates the far field. Referees should not have accepted <http://www.hou.usra.edu/meetings/V2050/pdf/8250.pdf> as it is, on those grounds. >why not just put it on the surface ? by the way, you will have to water >cool it too. Because that is a different, and not useful, idea; superconductors were discovered about 11 decades ago. Use currently-available high- temperature superconductors or better, and cool by shades as will be done for JWST; allow the magnet to cool by radiation into the rest of the Universe. >extra credit questions; > >1. how much water is needed to cool magnet that generates a 1 T field >100,000 miles away. (how is this water stored?) None; why 100,000 miles, as according to you L1 is at 141,000,000 miles. (in a zero-litre container). >2. how much electricity in megawatts is required to run magnet, then to >pump water. None. But energy will be needed to create the dipole moment initially. >3. what % of partials will be deflected away and outside a 100 mile >zone on the surface around the magnet? (assume 98% speed of light) Wrong question. >4. What type of partials will be hardly by magnet ? Parse failure. Try writing in your native language. >>> While Green admits the idea is somewhat "fanciful," > >this dude works at NASA ??? Why not? NASA must have canteen staff, toilet cleaners, and PR people. But the esteemed originators should not be criticised for the failure of /hoi polloi/ to understand their published proposal, and perhaps to read it. The proposal is to deflect the solar wind, without adding energy to it. Therefore, the wind will press the magnet outwards; the magnet must be a little inwards from L1, because of that and of radiation pressure. -- (c) John Stockton, Surrey, UK. ¬@merlyn.demon.co.uk Turnpike v6.05 MIME. Merlyn Web Site < > - FAQish topics, acronyms, & links.
[toc] | [prev] | [next] | [standalone]
| From | john <johnsefton288@gmail.com> |
|---|---|
| Date | 2017-03-11 22:43 -0800 |
| Message-ID | <b2311018-ad69-4ac3-b86e-110186c6d0c8@googlegroups.com> |
| In reply to | #622589 |
Dr John "..proposal..." "Inanity"
[toc] | [prev] | [next] | [standalone]
| From | Serg io <invalid@invalid.com> |
|---|---|
| Date | 2017-03-12 11:52 -0500 |
| Message-ID | <oa3uc9$1eqc$1@gioia.aioe.org> |
| In reply to | #622589 |
On 3/11/2017 3:54 PM, Dr J R Stockton wrote: > In sci.astro message <o9p3o5$1gve$1@gioia.aioe.org>, Wed, 8 Mar 2017 > 08:16:28, S Ergio <invlid@invalid.com> posted: > >> On 3/8/2017 6:42 AM, Yousuf Khan wrote: >>> http://www.zdnet.com/article/nasa-proposes-artificial-magnetic-field- >>> to-make-mars-a-second-home/ > >>>> Green proposes that by placing a magnetic dipole shield at the Mars L1 >>>> Lagrange Point, a man-made magnetosphere sphere would cradle the >>>> entire planet. > > Sort of. The dipole would shield the dayside of the atmosphere of Mars > from the solar wind. By the way, in the past, at least some respected > authors called L1 "L2" and L2 "L1". The proposal is not by Green; it is > by Green /et al/. > >> how far away is Mars L1 Lagrange Point from Mars ? >> about 141,000,000 miles. > Very wrong. > >> how does magnetic field strength decline with distance ? >> 1/d^2 ? > For that, you need a monopole source. Point-dipole fields go as d^-3. no, the fields vary as d^n where n is between 2 and 4, and n is also a function of d, and orentation of the field. > >> so you need a magnet of at least 2*10^16 telsa ? ? > The field strength at the magnet is of itself not important. It is the > dipole moment which creates the far field. field strength is *the key* design requirement, it drives the rest of the design. Referees should not have > accepted <http://www.hou.usra.edu/meetings/V2050/pdf/8250.pdf> as it is, > on those grounds. > >> why not just put it on the surface ? by the way, you will have to water >> cool it too. > Because that is a different, and not useful, idea; superconductors were > discovered about 11 decades ago. Use currently-available high- > temperature superconductors or better, cooling is to lower copper coil losses, high temp superconducters are not yet reliable for this, unless you have a url to a 1 T magnet using one... I think it gets down to watts, if 100 W it probably could be done, if 2000, probably not. > and cool by shades as will be > done for JWST; allow the magnet to cool by radiation into the rest of > the Universe. but all that is limited by # Watts used, and if it is in sunlight, which it is. > > >> extra credit questions; >> >> 1. how much water is needed to cool magnet that generates a 1 T field >> 100,000 miles away. (how is this water stored?) > None; why 100,000 miles, as according to you L1 is at 141,000,000 miles. > (in a zero-litre container). you evade the question, how much heat is generated by the super-cooling refrigeration unit for a 1 T field at 100,000 miles ? ( leave "T at 100,000 miles" as a variable) How many Watts does will the refrigeration unit take to keep the unit cool? how many solar panels ? how much storage capacity is needed ? How much refrigeration fluid is lost each year ? (NASA has supercooled stuff in flight, limited life time due to fluid loss) > >> 2. how much electricity in megawatts is required to run magnet, then to >> pump water. > None. But energy will be needed to create the dipole moment initially. not so, see above, [Im sure NASA has info on this, effecient supercooling refegeration, not sure about application to a magnet, but they probably have a study on it] > >> 3. what % of partials will be deflected away and outside a 100 mile >> zone on the surface around the magnet? (assume 98% speed of light) > Wrong question. yep, wrong question to you, as you do not have any answer. > >> 4. What type of partials will be hardly by magnet ? > Parse failure. Try writing in your native language. you engrlish teacher ? this is physics group. > >>>> While Green admits the idea is somewhat "fanciful," >> >> this dude works at NASA ??? > > Why not? NASA must have canteen staff, toilet cleaners, and PR people. > But the esteemed originators should not be criticised for the failure of > /hoi polloi/ to understand their published proposal, and perhaps to read > it. need more engineering before reclassifying from pipe dream to possable. > The proposal is to deflect the solar wind, without adding energy to it. > Therefore, the wind will press the magnet outwards; the magnet must be a > little inwards from L1, because of that and of radiation pressure. > which directly goes to what the field strength should be, .
[toc] | [prev] | [next] | [standalone]
| From | Alan Folmsbee <omnilobe@gmail.com> |
|---|---|
| Date | 2017-03-12 10:20 -0700 |
| Message-ID | <5a4da6a1-b35f-46a4-9a28-d049402d437d@googlegroups.com> |
| In reply to | #622669 |
On Sunday, March 12, 2017 at 6:52:29 AM UTC-10, Serg io wrote: > no, the fields vary as d^n where n is between 2 and 4, and n is also a > function of d, and orentation of the field. The magnetic field intensity H is not a (1 / R^n) type of law. The B field, flux density also is not 1/R^n . Magnetism is not distance dependent, it depends on N, number of paired charged particles which can change with distance depending on material shapes. The number N of paired charged particles in the magnetic loop, and the relative velocity between them determines H and B. B is proportional to N v / v1 where v is relative velocity and v1 is a constant 1 meter per second.
[toc] | [prev] | [next] | [standalone]
| From | Serg io <invalid@invalid.com> |
|---|---|
| Date | 2017-03-12 13:33 -0500 |
| Message-ID | <oa44ae$1q9f$1@gioia.aioe.org> |
| In reply to | #622672 |
On 3/12/2017 12:20 PM, Alan Folmsbee wrote:
> On Sunday, March 12, 2017 at 6:52:29 AM UTC-10, Serg io wrote:
>
>> no, the fields vary as d^n where n is between 2 and 4, and n is also a
>> function of d, and orentation of the field.
>
> The magnetic field intensity H is not a (1 / R^n) type of law.
> The B field, flux density also is not 1/R^n .
>
> Magnetism is not distance dependent, it depends on N, number
> of paired charged particles which can change with
> distance depending on material shapes.
> The number N of paired charged particles in the magnetic loop,
> and the relative velocity between them determines H and B.
>
> B is proportional to N v / v1
>
> where v is relative velocity and v1 is a constant 1 meter per second.
>
>
the field falls off as d^(-n)
2 < n < 3 or 4 depends upon field orentation and distance from
generator.
http://www.instructables.com/id/Evaluate-magnetic-field-variation-with-distance/step4/There-is-no-simple-answer/
http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/curloo.html#c3
[toc] | [prev] | [next] | [standalone]
| From | Alan Folmsbee <omnilobe@gmail.com> |
|---|---|
| Date | 2017-03-12 13:30 -0700 |
| Message-ID | <e9db4aaa-f944-4ab8-8fb2-1106c26e0380@googlegroups.com> |
| In reply to | #622680 |
On Sunday, March 12, 2017 at 8:33:55 AM UTC-10, Serg io wrote: > On 3/12/2017 12:20 PM, Alan Folmsbee wrote: > > On Sunday, March 12, 2017 at 6:52:29 AM UTC-10, Serg io wrote: > > > >> no, the fields vary as d^n where n is between 2 and 4, and n is also a > >> function of d, and orentation of the field. > > > > The magnetic field intensity H is not a (1 / R^n) type of law. > > The B field, flux density also is not 1/R^n . > > > > Magnetism is not distance dependent, it depends on N, number > > of paired charged particles which can change with > > distance depending on material shapes. > > > The number N of paired charged particles in the magnetic loop, > > and the relative velocity between them determines H and B. > > > > B is proportional to N v / v1 > > > > where v is relative velocity and v1 is a constant 1 meter per second. > > > > > > the field falls off as d^(-n) > > 2 < n < 3 or 4 depends upon field orentation and distance from > generator. Yes, that is an approximation for a point-like situation. Mars and Earth are not point-like. A North and South Pole as far apart as 8000 miles is expected. A Martian apparatus for making a magnetic shield can use the knowledge from the book about non-rotating magnetic actuators and shields. See Book: "Linear Electric Actuators and Generators" by Boldea and Nasar Cambridge University Press (September 26, 2005) When I read that book, I also was looking for a simple force = K / R^n force formula. Tha Book does not show a simple formula. It shows that the materials and shapes determine the gap. Magnetic linear motors for shielding Mars will need a "gap" of a thousand miles instead of the mm range in the Book. The moon Phobos is over a thousand miles, so one coil on Deimos and one on Phobos can focus the charged cosmic ray ions. The apparatus will pair a proton on Phobos with an electron on Deimos, for an example. The velocity between them will make the field go past some areas that are "swept safe". Then the astronaughts can go farming, for all they will care. But when the moons set, beware.
[toc] | [prev] | [next] | [standalone]
| From | Serg io <invalid@invalid.com> |
|---|---|
| Date | 2017-03-12 18:22 -0500 |
| Message-ID | <oa4l6t$s5h$1@gioia.aioe.org> |
| In reply to | #622694 |
On 3/12/2017 3:30 PM, Alan Folmsbee wrote: > On Sunday, March 12, 2017 at 8:33:55 AM UTC-10, Serg io wrote: >> On 3/12/2017 12:20 PM, Alan Folmsbee wrote: >>> On Sunday, March 12, 2017 at 6:52:29 AM UTC-10, Serg io wrote: >>> >>>> no, the fields vary as d^n where n is between 2 and 4, and n is also a >>>> function of d, and orentation of the field. >>> >>> The magnetic field intensity H is not a (1 / R^n) type of law. >>> The B field, flux density also is not 1/R^n . >>> >>> Magnetism is not distance dependent, it depends on N, number >>> of paired charged particles which can change with >>> distance depending on material shapes. >> >>> The number N of paired charged particles in the magnetic loop, >>> and the relative velocity between them determines H and B. >>> >>> B is proportional to N v / v1 >>> >>> where v is relative velocity and v1 is a constant 1 meter per second. >>> >>> >> >> the field falls off as d^(-n) >> >> 2 < n < 3 or 4 depends upon field orentation and distance from >> generator. > > Yes, that is an approximation for a point-like situation. Mars > and Earth are not point-like. A North and South Pole as far apart as > 8000 miles is expected. but the L1 generator is a point, less than 0.01 miles across, then over 100,000 miles away. > > A Martian apparatus for making a magnetic shield can use the knowledge from > the book about non-rotating magnetic actuators and shields. See Book: > "Linear Electric Actuators and Generators" by Boldea and Nasar > Cambridge University Press (September 26, 2005) it can be an electromagnic, only the electrical generator/cooling system would have moving parts. > When I read that book, I also was looking for a simple > > force = K / R^n > > force formula. Tha Book does not show a simple formula. same formula here, force = K/R^n where K is some constant, with R as distance, and n in the range of 2 < n < 4 (n varies with R and with field orentation) > It shows that the materials and shapes determine the gap. > Magnetic linear motors for shielding Mars will need a "gap" > of a thousand miles instead of the mm range in the Book. no motor needed, only a magnetic field. > The moon Phobos is over a thousand miles, so one coil on > Deimos and one on Phobos can focus the charged cosmic ray ions. > The apparatus will pair a proton on Phobos with an electron > on Deimos, for an example. The velocity between them will make > the field go past some areas that are "swept safe". Then > the astronaughts can go farming, for all they will care. Plows on a farm wont work, no O2 for the engine. > But when the moons set, beware. >
[toc] | [prev] | [next] | [standalone]
| From | Otplate Yuugaku <yu@yotwaglwt.pa> |
|---|---|
| Date | 2017-03-08 15:32 +0000 |
| Message-ID | <o9p85u$1q1g$1@gioia.aioe.org> |
| In reply to | #622125 |
Yousuf Khan wrote: > http://www.zdnet.com/article/nasa-proposes-artificial-magnetic-field-to- make-mars-a-second-home/ > >> However, researchers have proposed a way to make Mars more habitable -- >> by creating an artificial magnetic field to reduce radiation levels. lol. It's so easy coming up with proposes. The catch is to implement it for real. As for instance on Moon, where as such the radiation level should hit twice as much as in empty space (the reflected). What do you have to say in your defence. They don't even have a vehicle to transport people to the International Space Station. What are they talking about.
[toc] | [prev] | [next] | [standalone]
| From | Otplate Yuugaku <yu@yotwaglwt.pa> |
|---|---|
| Date | 2017-03-08 15:52 +0000 |
| Message-ID | <o9p9c4$1siq$1@gioia.aioe.org> |
| In reply to | #622125 |
Yousuf Khan wrote: >> While Green admits the idea is somewhat "fanciful," the scientists >> insist that it is not outside the realm of possibility, and could >> assist in the future exploration of the planet. This is just great. Now go clean your room. How to Clean Your Room (with Examples) - wikiHow http://www.wikihow.com/Clean-Your-Room
[toc] | [prev] | [next] | [standalone]
| From | "reber G=emc^2" <herbertglazier0@gmail.com> |
|---|---|
| Date | 2017-03-08 09:17 -0800 |
| Message-ID | <e50bab06-bde0-43d1-ae5d-0942e0517e3f@googlegroups.com> |
| In reply to | #622125 |
On Wednesday, March 8, 2017 at 4:42:24 AM UTC-8, Yousuf Khan wrote: > http://www.zdnet.com/article/nasa-proposes-artificial-magnetic-field-to-make-mars-a-second-home/ > > > However, researchers have proposed a way to make Mars more habitable -- by creating an artificial magnetic field to reduce radiation levels. > > > > To combat some of the main barriers to sending humans to Mars, as reported by Universe Today, last week, NASA hosted a discussion and presentation group called the Planetary Science Vision 2050 Workshop. > > > > At the event, scientists and researchers discussed the future possibilities of space exploration, and during one talk, NASA Planetary Science Division Director Dr. Jim Green proposed ways to deploy a magnetic shield around the planet which could act as a barrier to radiation and reduce the need for extreme protective equipment. > > > > The proposal (.PDF) relies on the theory that over four billion years ago, the planet's magnetic field vanished, turning the planet from a warm, wet environment to a dry husk. Without returning some kind of magnetic field to Mars, this situation will not change. > > > > Green proposes that by placing a magnetic dipole shield at the Mars L1 Lagrange Point, a man-made magnetosphere sphere would cradle the entire planet. > > > > The team says that previous tests in lab conditions suggest that inflatable structures could potentially generate a magnetic dipole field at a level of perhaps 1 or 2 Tesla, protecting against both radiation and solar winds. > > > > In addition, such a field could result in Mars' atmosphere thickening over time, creating a greenhouse effect which could increase the planet's surface temperature by up to four degrees and melt northern polar ice caps. > > > > While Green admits the idea is somewhat "fanciful," the scientists insist that it is not outside the realm of possibility, and could assist in the future exploration of the planet. Mars needs #1 heavy air #2 running surface water #3 closer to sun.NASA needs more brains.Trebert
[toc] | [prev] | [next] | [standalone]
| From | "hanson" <hanson@quick.net> |
|---|---|
| Date | 2017-03-08 12:43 -0800 |
| Message-ID | <o9pq8a$424$1@dont-email.me> |
| In reply to | #622158 |
<http://tinyurl.com/Loudmouth-Glazier-8Feb2017> is "reber G=emc^2" <herbertglazier0@gmail.com> who "needs #1 heavy air. #2 needs more brains"said Trebert. > So, Glazier, your #1 heavy air theory, is just HOT air coming out of your mouth and asshole, unless & until you, Bert explain which one of your 17 theories turned you into the Face-Shitter and Criminal Graveyard Vandal that you are.
[toc] | [prev] | [next] | [standalone]
| From | The Starmaker <starmaker@ix.netcom.com> |
|---|---|
| Date | 2017-03-08 10:38 -0800 |
| Message-ID | <58C04F97.5C63@ix.netcom.com> |
| In reply to | #622125 |
Yousuf Khan wrote:
>
> http://www.zdnet.com/article/nasa-proposes-artificial-magnetic-field-to-make-mars-a-second-home/
>
> > However, researchers have proposed a way to make Mars more habitable -- by creating an artificial magnetic field to reduce radiation levels.
> >
> > To combat some of the main barriers to sending humans to Mars, as reported by Universe Today, last week, NASA hosted a discussion and presentation group called the Planetary Science Vision 2050 Workshop.
> >
> > At the event, scientists and researchers discussed the future possibilities of space exploration, and during one talk, NASA Planetary Science Division Director Dr. Jim Green proposed ways to deploy a magnetic shield around the planet which could act as a barrier to radiation and reduce the need for extreme protective equipment.
> >
> > The proposal (.PDF) relies on the theory that over four billion years ago, the planet's magnetic field vanished, turning the planet from a warm, wet environment to a dry husk. Without returning some kind of magnetic field to Mars, this situation will not change.
> >
> > Green proposes that by placing a magnetic dipole shield at the Mars L1 Lagrange Point, a man-made magnetosphere sphere would cradle the entire planet.
> >
> > The team says that previous tests in lab conditions suggest that inflatable structures could potentially generate a magnetic dipole field at a level of perhaps 1 or 2 Tesla, protecting against both radiation and solar winds.
> >
> > In addition, such a field could result in Mars' atmosphere thickening over time, creating a greenhouse effect which could increase the planet's surface temperature by up to four degrees and melt northern polar ice caps.
> >
> > While Green admits the idea is somewhat "fanciful," the scientists insist that it is not outside the realm of possibility, and could assist in the future exploration of the planet.
pro·pose
pr?'poz/
verb
3rd person present: proposes
1.
put forward (an idea or plan) for consideration or discussion by
others.
Get wit the program...it's fake news.
They sit in a room everyday with only one agenda...pro·pose.
They are simply tryin to remain...revelant, but they are not.
Read the Headline: "NASA proposes..."
It's just fuckin TALK!
Get wit the program...it's fake news.
You're just a wishful thinker...Yousuf.
The first step, think for yourself..
[toc] | [prev] | [standalone]
Page 3 of 3 — ← Prev page 1 2 [3]
Back to top | Article view | sci.physics
csiph-web