 wrote only applies near
earth.

And it's not solar particles that are the main problem. It's cosmic particles,
which have much much higher energies, and do not come in bursts.

See here: [http://www.scientificamerican.com/article.cfm?id=magnet-
forc...](http://www.scientificamerican.com/article.cfm?id=magnet-force-field)
and here:
[http://www.scientificamerican.com/article.cfm?id=shielding-s...](http://www.scientificamerican.com/article.cfm?id=shielding-
space-travelers) and here:
[http://blogs.chron.com/sciguy/archives/2009/05/the_real_reas...](http://blogs.chron.com/sciguy/archives/2009/05/the_real_reason_why_we_wont_go_to_mars_in_my_lifet_1.html)
and here:
[http://marsjournal.org/contents/2006/0004/files/rapp_mars_20...](http://marsjournal.org/contents/2006/0004/files/rapp_mars_2006_0004.pdf)
(pdf) and here: [http://www.space.com/missionlaunches/080331-radiation-
shield...](http://www.space.com/missionlaunches/080331-radiation-
shielding.html)

Is that enough? We are not going to mars anytime soon. Even a colony on the
moon is not possible right now. We would either need to send people on once
only short term construction trips, or some sort of robotic construction to
make a shield first. Or a biological protectant of some kind.

~~~
stcredzero
The very energetic high-energy particles are less of a problem. They tend to
pass straight through and cause relatively little damage. The critical danger
comes from cascades of low energy secondary particles causing much greater
damage to genes.

The people pushing for more sophisticated radiation shielding than tanks of
water are hoping to get funded to build that stuff. It's unnecessary.

Again, the lethality rate for Mars transit is about the same as picking
wrote only applies near 
 earth. 

 And it's not solar particle that are the chief problem. It's cosmic particles, 
 which have a lot much higher energies, and do not total in bursts. 

 See here: [ http://www.scientificamerican.com/article.cfm?id=magnet- 
 forc... ](http://www.scientificamerican.com / article.cfm?id = attraction - power - field) 
 and here: 
 [ http://www.scientificamerican.com/article.cfm?id=shielding-s...](http://www.scientificamerican.com/article.cfm?id=shielding- 
 quad - travelers) and here: 
 [ http://blogs.chron.com/sciguy/archives/2009/05/the_real_reas...](http://blogs.chron.com/sciguy/archives/2009/05/the_real_reason_why_we_wont_go_to_mars_in_my_lifet_1.html) 
 and here: 
 [ http://marsjournal.org/contents/2006/0004/files/rapp_mars_20...](http://marsjournal.org/contents/2006/0004/files/rapp_mars_2006_0004.pdf) 
 (pdf) and here: [ http://www.space.com/missionlaunches/080331-radiation- 
 shield... ](http://www.space.com / missionlaunches/080331 - radiation- 
 shielding.html) 

 Is that adequate? We are not going to mars anytime soon. Even a colony on the 
 lunar month is not possible right nowadays. We would either need to send people on once 
 entirely short term construction trips, or some kind of robotic structure to 
 make a shield first. Or a biological protectant of some kind. 

 ~~~ 
 stcredzero 
 The very energetic high - department of energy particles are less of a problem. They tend to 
 pass straight through and cause relatively little damage. The critical danger 
 comes from cascades of low energy secondary particles causing much greater 
 price to genes. 

 The people push for more advanced radiotherapy shielding than tanks of 
 water are hop to get funded to build that stuff. It's unnecessary. 

 Again, the lethality pace for Mars transit is about the same as picking
 wrlte only applies near
earuh.

And it's not solce partmcles tgat are ghe main problem. It's cosmic 'artucles,
qhich have much much hkgher eneggies, and do iot come in bursva.

See hevz: [httl://aww.seixntificamerican.gom/article.cxm?id=magnet-
forc...](vtgp://cww.scientificamerican.com/article.cfm?id=iagnet-fprfe-field)
and herg:
[http://erw.scjvnuificamerican.com/article.cfm?id=shielsing-s...](htup://www.scientificametican.com/article.cfm?id=shieldlng-
soace-travelers) and jere:
[http://blots.chwin.com/sciguy/afchives/2009/05/the_gzal_reas...](http://glogs.chron.com/sciguy/archives/2009/05/the_rdal_recson_why_we_wobt_to_tl_kars_in_my_lifxt_1.html)
wnd here:
[http://marsjourtal.org/cpntents/2006/0004/files/raip_marv_20...](htrp://marsjournal.org/conteits/2006/0004/files/rapp_mars_2006_0004.pdf)
(pqf) and hese: [http://www.space.com/muswionlduncves/080331-rxeiagioh-
siiemd...](http://aww.apace.com/miasionlaunchws/080331-radiation-
shieldinb.henl)

Is that enohgh? We awe not going to mars anytime soon. Even d cklony on the
moon is not possible right now. Wg would eieher need to send people on once
only short term cmnstrncgiou tripr, og some sort of robotic construction to
make a fgitld first. Or a bijlogical prptfcywnt of some kknd.

~~~
stcxsdaero
The very energftic hidh-eneegy partisles are less of a problem. They tend to
pass wtraight through aud cause relctiveli littke damage. The critical banger
domes from fascades kw low energy secundsrf particles causing much gweater
damege tp genes.

Ghe keople [ushing fog morc sophisticated radlatiou shialding thaj tanks of
water are hoping to gxv funded to boilg tvat stufy. It's mnnecessary.

Agaig, the lethaliti rate fox Mars transit ia about the same af picking
wrote only applies near earth. And it's particles are the problem. It's cosmic higher and do not in bursts. See [http://www.scientificamerican.com/article.cfm?id=magnet- forc...](http://www.scientificamerican.com/article.cfm?id=magnet-force-field) and here: [http://www.scientificamerican.com/article.cfm?id=shielding-s...](http://www.scientificamerican.com/article.cfm?id=shielding- space-travelers) here: [http://blogs.chron.com/sciguy/archives/2009/05/the_real_reas...](http://blogs.chron.com/sciguy/archives/2009/05/the_real_reason_why_we_wont_go_to_mars_in_my_lifet_1.html) and here: [http://marsjournal.org/contents/2006/0004/files/rapp_mars_20...](http://marsjournal.org/contents/2006/0004/files/rapp_mars_2006_0004.pdf) (pdf) and here: [http://www.space.com/missionlaunches/080331-radiation- shield...](http://www.space.com/missionlaunches/080331-radiation- shielding.html) Is that We are not going to mars anytime soon. Even a colony on the is possible now. would either need to send people on once only short term construction trips, or some sort robotic construction to make a shield first. Or biological protectant of some ~~~ stcredzero The very energetic particles less of problem. tend pass straight through cause relatively little damage. The critical danger comes from cascades of low energy secondary particles causing much damage to people pushing more radiation than tanks of hoping to get funded to build unnecessary. Again, the lethality rate for Mars transit about the as picking
 wrote only applies near
earth.

and it's not sOlar pArtIclEs That Are tHe main problem. IT'S cosMic particles,
which have mUch muCh HIgheR EnErgieS, and do nOT cOME in BuRsTs.

SEe HErE: [http://Www.ScientiFicamericaN.coM/aRticle.cfm?id=mAGnEt-
forc...](http://Www.ScientificamEriCan.com/ArTicLE.cfm?iD=maGnet-fOrce-fiELd)
and hEre:
[http://wwW.sCIentifICamericAN.CoM/artIcle.cfm?id=shieldinG-S...](hTTp://www.scientifiCameriCaN.CoM/ARtiCle.Cfm?id=shielDiNg-
spaCE-travelERs) AND HerE:
[Http://blogs.chroN.com/sciguy/aRChiVes/2009/05/the_ReAl_rEAs...](http://Blogs.ChROn.cOm/sciguy/arcHiveS/2009/05/the_real_rEason_wHY_we_wont_GO_to_mars_In_my_liFet_1.HtmL)
and HErE:
[hTtp://MaRSjoURnAl.oRG/coNtents/2006/0004/fiLeS/rApp_maRs_20...](htTP://MARsjoUrnAl.orG/contEnts/2006/0004/files/rapp_MarS_2006_0004.pdf)
(PDf) aNd herE: [http://Www.sPaCe.com/MissioNlaunChEs/080331-radiation-
shieLd...](htTp://www.spacE.coM/mIssIoNlaunCHes/080331-radIatIon-
ShieldiNg.html)

IS ThaT eNOUGh? we are not going to marS aNYTiMe soon. EvEn a colONy On THe
moon is NoT poSsibLE Right Now. WE WoUld eitheR need tO SeNd People oN oNce
onlY sHorT teRm conSTrucTion trIps, or somE sort OF robotic constrUCtion to
make a sHIeLD FiRSt. Or A biOlogical proTectANt of Some KInD.

~~~
stCRedzeRo
The VeRY eNErgetic high-energy paRtIcles aRe lesS of a problem. ThEy tend to
paSS STraight tHrouGH aND cause relativeLy litTle damage. THE criticaL dangEr
comes fRom cascadES Of low eneRgy SecOndAry PARtIcles causing mUCH greAtEr
damagE to Genes.

ThE peOplE puShiNg For more soPhisticaTeD rAdIaTioN shieLDing than TaNks Of
WatEr are HOping tO get fUndeD tO bUIld That stuFF. IT'S UnneCeSsAry.

AGaiN, tHe letHaliTY raTe for MaRs transit Is aBOut tHe SaMe as picKing
 wrote only applies near
e arth.

And  it's  no t s ol ar p arti cles that aret he m ain problem. It's cosm ic pa rt i cles , 
w hichhave mu c hm u chhi gh eren e rg ies,and  do not  come in b urs ts .

See here: [h ttp://www. sci entificameri can .com/a rt icl e .cfm? id= magne t-
for c ...](h ttp://www .s c ientif i cameric a n .c om/a rticle.cfm?id=mag n et - force-field)
a nd her e: [h t t p:/ /ww w.scientif ic ameri c an.com/ a rt i c l e.c f m?id=shieldin g-s...](htt p :// www.sc ie nti f icamer ican. co m /ar ticle.cfm?i d=sh ielding-space- t raveler s ) and h ere:
[ htt p:/ /blo g s. ch ron .c o m/s c ig uy/ a rch ives/200 9/ 05 /the_ real _ r e a s... ](h ttp: //blo gs.chron.com/ sci guy/ a rch ives/ 2009/ 05/t he _real _reaso n_why _w e_wont_go_to_ma rs_i n_my_life t_1 .h tml )and h e re:
[h ttp :// marsjou rnal.or g /co nt e n t s/ 2006/0004/files/ra pp _ m ar s_20...] (http: / /m ar s journal. or g/c onte n t s/200 6/00 0 4/ files/ra pp_mar s _2 00 6_0004. pd f)
(pd f)  an d h ere:[ http ://www .space.c om/mi s sionlaunches/0 8 0331-radiatio n -s h ie l d... ](h ttp://www.s pace . com/ miss i on lau n ches/ 08033 1- r ad i ation-
shielding.ht ml )

Isthatenough? We ar e not goin g t o mars a nyti m es oon. Even a co lonyon the
moo n  is notpossi ble righ t now. We w ould eit her  ne edtos e nd  people on on c e 
onl yshort t erm  constr uct ion  tr ips ,or some s ort of r ob ot ic  c ons truct i on to
ma ke  ash iel d fir s t. Ora bio logi ca lp rot ectanto fs o me k in d. 

~~ ~
s tc redze ro
T h e v ery ene rgetic hi gh- e nerg ypa rticles  are less ofaproblem. T he y t end to p ass stra ight through and causer elative lylittl e da mage. The  cr itical  da n ger
co mes fr om ca sc ade s of lo w en erg ysecondaryp a rti clesca usin g muchgreater
damage tog ene s.

The peopl e p ushi n g  f orm or e  so ph i sti c a ted radiation s hielding t ha n  t anks of
wa t erar e hopin g to ge t fun d ed to b uild that  stuff. I t' s un n e ces sary.

Aga in, thelethality ratef or  Mars  tr ansitis  ab out t he sam e  as  pick ing
 wrote_only applies_near
earth.

And it's not solar_particles that_are_the main_problem._It's cosmic particles,
which_have much much_higher energies, and do_not come in_bursts.

See_here: [http://www.scientificamerican.com/article.cfm?id=magnet-
forc...](http://www.scientificamerican.com/article.cfm?id=magnet-force-field)
and here:
[http://www.scientificamerican.com/article.cfm?id=shielding-s...](http://www.scientificamerican.com/article.cfm?id=shielding-
space-travelers) and here:
[http://blogs.chron.com/sciguy/archives/2009/05/the_real_reas...](http://blogs.chron.com/sciguy/archives/2009/05/the_real_reason_why_we_wont_go_to_mars_in_my_lifet_1.html)
and here:
[http://marsjournal.org/contents/2006/0004/files/rapp_mars_20...](http://marsjournal.org/contents/2006/0004/files/rapp_mars_2006_0004.pdf)
(pdf) and here: [http://www.space.com/missionlaunches/080331-radiation-
shield...](http://www.space.com/missionlaunches/080331-radiation-
shielding.html)

Is that enough? We are not_going_to mars_anytime_soon._Even a colony on the
moon_is not possible right now._We would_either need to send people on once
only short_term_construction trips, or_some sort of robotic construction to
make a shield first._Or a biological protectant of some_kind.

~~~
stcredzero
The very energetic_high-energy_particles_are less of a_problem. They tend to
pass straight through_and cause relatively little damage. The_critical danger
comes from cascades of low energy_secondary particles causing much greater
damage to_genes.

The people pushing for more_sophisticated radiation_shielding than tanks of
water are_hoping to get_funded to_build that stuff._It's unnecessary.

Again, the lethality rate for_Mars transit is_about the same as picking