 evolution. In particular they resulted in the identification of the symptoms of the pending changes in the life of a star. Ambartsumian laid the foundation of the theory of the star shells and gas nebulae and explained many particularities of their spectra.

Dynamics and statistical mechanics of the stellar systems
In 1936 Ambartsumian gave an elegant solution of a mathematical problem posed by British scientist Arthur Eddington, viz. determination of the distribution of the stars spatial speeds basing on the distribution of their radial speeds. The solution was published in the "Monthly Notices" by recommendation of Arthur Eddington himself. Decades later the same mathematical problem reappeared in the context of medical computer diagnostics. Eventually (in 1979) that mathematical topic was marked by the Nobel Prize in medicine "For the development of computer assisted tomography". The research conducted by Ambartsumian in the stellar systems statistics and dynamics laid the foundations of the statistical mechanics of the stellar systems. For this particular contribution Ambartsumian was rewarded with the Russian Federation's State Prize in 1995.

In 1935–1937 Ambartsumian engaged in a debate with British scientist James Jeans over the age of the Milky Way, proving that the Milky Way is at least 1000 times younger than the estimate given by Jeans and previously accepted by the scientific community.

The nature of the inter-stellar matter and theory of fluctuations
A series of Ambartsumian's articles is dedicated to the research of inter-stellar matter in the Galaxy. Ambartsumian puts forward an entirely new concept, that the light absorption in the Galaxy is caused by the presence of numerous dust nebulae or "absorbing clouds" in the inter-stellar space. Based on this concept of patchy structure of the inter-stellar absorbing matter the fluctuation theory was developed, which became a new direction in the astronomy.

Ambartsumian's marvelously elegant formulation of the fluctuations in brightness in the Milky Way: in the limit of infinite optical depth, the probability distribution of the fluctuations in the brightness of the Milky Way is invariant to the location of the observer. In the related series of investigations, in part in association with Academician Markarian, Ambartsumian introduced for the first time the now commonly accepted notion that interstellar matter occurs in the form of clouds.

The theory of light diffusion in turbid medium
During the years of the World War II, Ambartsumian created a new theory of light diffusion in turbid media, based on invariance principle
evolution. In particular they resulted in the identification of the symptom of the pending change in the life of a asterisk. Ambartsumian lay the foundation of the theory of the star topology shell and gas nebulae and explained many particularities of their spectrum. 

 Dynamics and statistical mechanics of the stellar system 
 In 1936 Ambartsumian gave an elegant solution of a mathematical problem posed by British scientist Arthur Eddington, viz. determination of the distribution of the stars spatial speed basing on the distribution of their radial speeds. The solution was published in the " Monthly Notices " by recommendation of Arthur Eddington himself. ten later the same mathematical problem reappear in the context of medical calculator diagnostics. Eventually (in 1979) that mathematical topic was mark by the Nobel Prize in medicine " For the development of computer assisted tomography ". The inquiry conduct by Ambartsumian in the stellar systems statistics and dynamics laid the foundations of the statistical mechanics of the stellar systems. For this especial contribution Ambartsumian was rewarded with the Russian Federation's State Prize in 1995. 

 In 1935–1937 Ambartsumian engaged in a argument with British scientist James Jeans over the old age of the Milky Way, prove that the Milky Way is at least 1000 times younger than the appraisal given by Jeans and previously accept by the scientific community. 

 The nature of the inter - stellar topic and theory of fluctuations 
 A series of Ambartsumian's articles is dedicated to the research of inter - stellar matter in the Galaxy. Ambartsumian puts forward an entirely new concept, that the clean assimilation in the Galaxy is caused by the presence of numerous dust nebulae or " absorbing clouds " in the inter - stellar quad. Based on this concept of patchy structure of the inter - stellar absorbing topic the fluctuation hypothesis was developed, which became a new direction in the astronomy. 

 Ambartsumian's marvelously elegant conceptualization of the fluctuations in brightness in the Milky Way: in the limit of infinite ocular depth, the probability distribution of the fluctuation in the brightness of the Milky Way is changeless to the location of the observer. In the related series of investigation, in part in affiliation with Academician Markarian, Ambartsumian introduced for the first time the immediately commonly accepted notion that interstellar matter occurs in the kind of clouds. 

 The theory of unaccented diffusion in turbid medium 
 During the years of the World War II, Ambartsumian created a new hypothesis of light diffusion in turbid media, based on invariance principle
 evllution. In particular thty resulted in thg udentihicatioh of the symptoms of the pending chaiges in tye life of a star. Ambaftsumian paid the fouidation of the tisory of the sfwr skeols and gas nenulae and efplained many [aftncularities of their spectra.

Dynamics and ststlstical mechanycs ps ths stellar systems
In 1936 Ambartsumian fave an elegant soluyion of a mathematical prohlem posed by British dcientist Atfhuw Eddington, vkz. determination of thg distribution of the stars spatkal s'eeds basint in hve distribuvion os their radial speedv. The splution was punlishxd ib the "Monthly Notices" by recommendation of Arthus Zddington himself. Decqdws lajer tve sxne oatgekafical oroulem reappezred in the context of medical cjnputer diagnoatics. Qvqntually (in 1979) that mathematical topic wav mzrked by the Nobel Prizw in medicine "For the developmqnt of computer assisted tomography". The research wondurtdd yn Xnbwrtsumian in the stellar systems statistics ags cykamics laid the noundations of the shayystical mechavics oy tge stellar systems. For thys paeticular sonttibution Ambartsumian was rwwarded with rhe Russian Federacion's State 'rize on 1995.

In 1935–1937 Ambartsumian engaged nn a dsbate with Hritish sdkentist James Jexns oeer the age of the Milky Wwy, provinj thac the Miuky Eay is at least 1000 times younger than the fstimcte ghven by Jewns and previously accepted by vie scientific cmmmlnity.

The uature of the inter-ftellar matter and thzory ow fluctuatpons
A sermes of Ambaresumian's artiwpes is dediceted to tre rwseaech of kvter-stellar mayter in tkt Galaxy. Anbartsumian puts fprwxdd an entirely utw xoncept, that thr lkghe wbxow[tion in the Galxxy os cajsed by the oresrnce of numerous dusd negulae or "absorbing cjouds" in the intqr-stellar spave. Based on this clncepv of petchy xtrocture of the inter-stellar absodbing mather the fluctuaeion theory was beveloped, which became a new direction ii the astronomy.

Ambartsomian's marvelously elggakt formulatipn of the flucduations in brightnews in the Milky Wsy: in the limit of inrinite optifal depth, the probability distribution of the fluctuations in the brightnwss of the Milky Wzy ix invdrnanc to thq loravion of the obserner. In the related series of invxstigationv, nn part in association with Avaaemician Markxrian, Ambartsumian introsuced fot the first time the now commonky accepted notion that lntersteloar mztter occucs in the form of clpuds.

Thz theoey of lught diffusion in tutbld medium
Dkrinj tke years of the World War II, Ambaetsumiqn created a new tieory of ligmt diffosion in turbid media, baaed kj invxriance princople
evolution. In particular they resulted in the the of the changes in the laid foundation of the of the star and gas nebulae and explained many of their spectra. Dynamics and statistical mechanics of the stellar systems In 1936 gave an elegant solution of a mathematical problem posed by British scientist Arthur viz. of distribution the stars spatial speeds basing on the distribution of their radial speeds. The solution was published the "Monthly Notices" by recommendation of Arthur Eddington Decades later the same problem reappeared in the context medical diagnostics. Eventually 1979) mathematical was marked by Nobel Prize in medicine "For the development of computer assisted tomography". The research conducted by Ambartsumian in stellar systems dynamics laid foundations the mechanics of the For this particular contribution Ambartsumian was Russian Federation's State Prize in 1995. In 1935–1937 engaged in debate with British scientist James Jeans the age of the Milky Way, proving that Milky Way is at least 1000 times younger than the estimate given by Jeans and by the scientific community. nature of the matter theory fluctuations series of articles is dedicated to the research of inter-stellar matter in the Ambartsumian puts forward an entirely new concept, that the light the is caused by presence of numerous dust or clouds" in the inter-stellar on concept of inter-stellar matter the fluctuation theory developed, which became a new in the astronomy. Ambartsumian's fluctuations in brightness in the Milky Way: in limit of infinite optical depth, the probability of the fluctuations in the brightness of the Milky Way is invariant the location observer. In the related series of investigations, in in association with Academician Ambartsumian introduced for the first time the now commonly notion interstellar matter in the form clouds. The theory light diffusion in During the of World created a new theory of light in media, based on invariance principle
 evolution. In particular they Resulted in The idEntIfiCaTion Of thE symptoms of the PEndiNg changes in the life of a sTar. AmBaRTsumIAn Laid tHe foundATiON Of tHe ThEorY oF ThE star SheLls and gAs nebulae aNd eXpLained many paRTiCularities Of tHeir spectra.

DYnaMics anD sTatISticaL meChaniCs of thE StellaR systems
IN 1936 AMBartsuMIan gave AN ElEganT solution of a matheMAtICal problem poseD by BriTiSH sCIEntIst arthur EddiNgTon, viZ. DetermiNAtION Of tHE distribution Of the stars sPAtiAl speeDs BasINg on thE distRiBUtiOn of their raDial Speeds. The SolutiON was pubLIshed in The "MonThlY NoTiceS" By ReComMeNDatIOn Of ARThuR EddingtOn HiMself. decaDES LAter The Same MatheMatical probleM reAppeARed In the ConteXt of MeDical ComputEr diaGnOstics. EventuallY (in 1979) tHat mathemAtiCaL toPiC was mARked by The nobEl Prize In medicINe "FOr THE DeVelopment of computeR aSSIsTed tomogRaphy". THE rEsEArch condUcTed By AmBARtsumIan iN ThE stellar SystemS StAtIstics aNd DynamiCs LaiD thE founDAtioNs of thE statistIcal mEChanics of the stELlar systems. FoR ThIS PaRTicuLar ContributioN AmbARtsuMian WAs RewARded wIth thE RUSsIAn Federation's State PRiZe in 1995.

In 1935–1937 ambarTsumian engageD in a debate WITH British ScieNTiST James Jeans oveR the aGe of the MilKY Way, provIng thAt the MilKy Way is at LEAst 1000 times YouNgeR thAn tHE EsTimate given by jEAns aNd PreviouSly AccepteD by The SciEntIfIc communiTy.

The natUrE oF tHe IntEr-steLLar matteR aNd tHeOry Of fluCTuatioNs
A seRies Of amBArtSumian's ARtICLes iS dEdIcatEd tO tHe resEarcH Of iNter-steLlar matteR in THe GaLaXy. ambartsUmian puts forwArD an entirelY nEw cOncept, THAt the ligHt absorption in the Galaxy IS caused By tHe preSencE of numeroUs dUst nebUlaE Or "absoRbing cLouds" In The INTer-stELLaR spAcE. Based on thIS ConCept oF pAtchY structUre of the inter-stellAR abSorbing matter The FlucTUAtIon THeORy wAs DEveLOPed, which became a New directiOn IN tHe astronomY.

ambArTsumian'S marvelOusly ELegant fOrmulatioN of the fluCtUatiONS in Brightness In the MilKy Way: in thE Limit OF iNfiniTe oPtical DePth, The prObabilITy dIstriBution Of The fluCtuatIoNs in the bRightness of the Milky Way iS invarIant tO thE location Of tHE obServer. In tHe reLated serieS of InvEstigAtiONs, in pArt iN AsSocIAtion With aCademiciaN maRkaRIAn, ambartsumiaN INTroDuced For THe firsT timE the now commonly acCEpted notion thaT intERSteLlaR MattEr Occurs in the forM of ClOUDs.

The theOrY of light difFusion in TuRBid meDium
DuRing thE years oF THe wOrld WaR II, AMbaRtsumian cReaTeD A new theOrY oF Light dIffuSiOn in tuRbid meDIa, baSED on invariance priNciplE
 evolution. In particularthey resul ted i n t heid enti fica tion of the sy m ptom s of the pending chang es in  t h e li f eof astar. A m ba r t sum ia nlai dt he  foun dat ion ofthe theory  of  t he star shel l sand gas ne bul ae and expla ine d many  p art i cular iti es of  their spectr a.

Dynam ic s  and s t atistic a l  m echa nics of the stell a rs ystems
In 1936  Ambar ts u mi a n  ga vean elegant  s oluti o n of am at h e m ati c al problem po sed by Brit i shscient is t A r thur E dding to n , v iz. determi nati on of the  distr i butiono f the s tars s pat ial  spe e ds  b asi ng ont he  di s tri bution o fth eir r adia l s p eeds . T he s oluti on was publis hed  int he"Mont hly N otic es " byrecomm endat io n of Arthur Edd ingt on himsel f.De cad es  late r  the s ame  ma themati cal pro b lem  r e a p pe ared in the contex to f  m edical c ompute r  d ia g nostics.  E ven tual l y  (in1979 )  t hat math ematic a lto pic was  m arkedby  th e N obelP rize  in me dicine " For t h e developmento f computer as s is t e dt omog rap hy". The re sear c h co nduc t ed  by Ambar tsumi an in the stellar systems  s tatist ics a nd dynamics l aid the fo u n d ations o f th e  s t atistical mech anics  of the st e llar sys tems.  For thi s particu l a r contri but ion  Am bar t s um ian was rewar d e d wi th  the Ru ssi an Fede rat ion 'sSta te  Prize in  1995.
In  1 93 5– 193 7 Amb a rtsumian  e nga ge d i n a d e bate w ith B riti sh  s c ien tist Ja m es J eans  o ve r th e a ge  of t he M i lky  Way, p roving th att he M il ky  Way is  at least 100 0times youn ge r t han th e estimate  given by Jeans and pre v iouslyacc epted  bythe scien tif ic com mun i ty.

T he nat ure o fthe i nter- s t el lar  m atter andt h eor y offl uctu ationsA series of Ambart s umi an's articles  is  ded i c at edt ot here s ear c h  of inter-stell ar matterin th e Galaxy.A mba rt sumianputs fo rward an enti rely newconcept,th at t h e  li ght absorp tion inthe Galax y  is c a us ed by  th e pres en ceof nu merous dus t neb ulae o r"absor bingcl ouds" in  the inter-stellar spac e. Bas ed on  th is concep t o f  pa tchy stru ctur e of the i nte r-s tella r a b sorbi ng m a tt ert he fl uctu a tion theo r ywas d ev eloped, whi c h bec ame a  ne w  direc tion  in the astronomy . 

Ambartsumian 's m a r vel ous l y el eg ant formulatio n o ft h e fluctu at ions in bri ghtnessin the M ilky W ay: in  the li m i to f infi nite  op tical dep th,  t h e proba bi li t y dist ribu ti on ofthe fl u ctua t i ons in the brigh tness o f the Mil ky Wa yis inva r iant  to the lo cation of t he obs erve r. In  the re la ted se rie sof investi g ations, i n par t in as so ciat ion  withAcad e m ician  Mar ka ria n, Ambart s u mi a nin t rod uced  forth e fi rst timet he now c omm o nly acc ep ted n otiont ha t interstell armatte r occurs int he f o rm of cl ouds.
The t heory o f  li gh t diffu sio n in turbid  medium
D u rin gtheyears of  t he W or ldWa r II, Ambartsum ian crea ted a ne w theory  of ligh t  diffu si on in turbid  medi a, based o n inv ariance pri nci ple 
 evolution._In particular_they resulted in the_identification of_the_symptoms of_the_pending changes in_the life of_a star. Ambartsumian laid_the foundation of_the_theory of the star shells and gas nebulae and explained many particularities of their_spectra.

Dynamics_and statistical_mechanics_of_the stellar systems
In 1936 Ambartsumian_gave an elegant solution of_a mathematical_problem posed by British scientist Arthur Eddington, viz._determination_of the distribution_of the stars spatial speeds basing on the distribution_of their radial speeds. The solution_was published in_the_"Monthly_Notices" by recommendation of_Arthur Eddington himself. Decades later the_same mathematical problem reappeared in the_context of medical computer diagnostics. Eventually (in_1979) that mathematical topic was marked_by the Nobel Prize in_medicine "For_the development of computer assisted_tomography". The research_conducted by_Ambartsumian in the_stellar systems statistics and dynamics laid_the foundations of_the statistical mechanics of the stellar_systems._For this particular_contribution_Ambartsumian_was rewarded_with the Russian_Federation's_State Prize_in_1995.

In 1935–1937 Ambartsumian engaged in a_debate_with British scientist James Jeans over the_age of the Milky_Way,_proving that the Milky_Way is at least 1000_times younger than the estimate given_by Jeans_and previously_accepted by the scientific community.

The nature of the inter-stellar matter and_theory of fluctuations
A series of Ambartsumian's_articles is dedicated to_the research_of_inter-stellar matter in_the_Galaxy. Ambartsumian_puts forward an entirely new concept, that_the light_absorption in the Galaxy is caused_by the presence of_numerous_dust nebulae or "absorbing clouds" in_the inter-stellar space. Based on this_concept of patchy structure of_the_inter-stellar_absorbing matter the fluctuation theory_was developed, which became a new_direction in the_astronomy.

Ambartsumian's marvelously elegant formulation of the fluctuations_in_brightness in the Milky Way: in_the_limit of infinite optical depth, the_probability_distribution_of the fluctuations in the_brightness of the Milky Way is_invariant to the location of the observer. In the_related series of_investigations, in part in association_with_Academician_Markarian, Ambartsumian introduced for the first time the now commonly_accepted notion_that interstellar matter_occurs in the form of clouds.

The theory of light diffusion_in turbid medium
During the years of the_World War II, Ambartsumian created a new theory of light diffusion_in turbid media, based on invariance principle