"planetebis Seqmna"
planetebi
Camoyalibda mzis nebuladan. diskos formis gazisa da
mtvris nawilakebis
Rrublisagan romelic Seiqmna mzis warmoqmnisas.
amJamad miRebuli
SexedulebiT planetebi Seiqmna akreciis gziT.
roca planetebi
Caisaxa mtvris nawilakebis marcvlebisagan romlebic
centraluri
protovarskvlavis irgvliv orbitaze moZraobdnen.. am
nawilakebis SezrdiT
Seiqmna “beltebi” 1-dan
10 km-mde diametris,
romelTa SejaxebiTa
da SeerTebiT Camoyalibda ufro didi sxeulebi
“planetisimalebi” - sawyisi planetebi, romelTa zoma daaxloebiT 5km
iyo. es sxeulebi
TandaTan izrdeboda Semdgomi Sejaxebebisa da
mcire nawilakebis
mizidulobis gamo. maTi radiusi weliwadSi
daaxloebiT 1 sm-iT
matulobda Semdgomi ramdenime milioni wlis
ganmavlobaSi.
Sida mzis sistema,
mzis sistemis Sida nawili daaxloebiT 4 a. e.,
sakmaod cxeli
(Tbili) iyo imisaTvis, rom aqrolad nivTierebebs
(airebs mag. meTans)
da wyals kondensacia ganecadaT. ase rom am
zonis SigniT
planetisimalebi iqmneboda mxolod maRali dnobis
temperaturis mqone
nivTierebebidan, rogorebicaa liTonebi (rkina,
nikeli da alumini)
da silikaturi qanebi. es kldovani sxeulebi,
qvebi, lodebi
SemdgomSi gaxdnen dedamiwismagvari planetebi (terrestrial
planets)
merkuri, venera, dedamiwa, marsi. zemoT CamoTvlili
nivTierebebi sakmaod
cotaa samyaroSi da nebulas mTeli masis
mxolod 0.6%
Seadgenen, ase rom “terestriulebi” ver gaxdebodnen
Zalian didi
zomisebi. terestriuli “embrionebi” dedamiwis masis
daaxloebiT 5% maT
Sewyvites zrda mtvris nawilakebis dagrovebis
xarjze. es mzis
Seqmniodan daaxloebiT 100000 wlis Semdeg moxda.
amis Semdeg am
sxeulebis urTierT SejaxebiT da SeerTebiT xdeboda
am planetasimalebis
zrda da ase mividnen isini axlandel zomebamde.
nebularobis TeoriaSi
akrecias uwodeben civi mikroskopuli mtvris
da yinulis
nawilakebis Sejaxebisa da Sewebebis process. es procesebi
mimdinareobs
protoplanetur disksa da gigantur airovan
protoplanetebSi, rac
mTavrdeba planetisimalebis SeqmniT.
airis gigantebi (iupiteri,
saturni, urani, neptuni) Camoyalibda
mzisgan ufro Sors,
e. w. yinulis zolze (gayinvis zoli, Tovlis
zoli) ufro Sors.
yinulis zoli marsisa da iupiteris orbitebs
Soris mdebareobs. am
manZilze temperatura sakmaod dabalia (T<150K)
da aqroladi nivTierebebic ki myar
mdgomareobaSia. yinuli (gayinuli
"terestriuli planetebi"
planetaTa formirebis
epoqis bolos mzis sistemis Sida nawili
“dasaxlebuli” 50-dan 100-mde mTvaridan marsamde zomis planetaTa
embrionebiT. maTi
Semdgomi zrda mxolod am sxeulebis SejaxebiTa
da SerwymiT xdeboda.
es procesi daaxloebiT 100 milioni weli
gagrZelda. es
sxeulebi gravitaciulad urTierTqmedebdnen
erTmaneTTan,
cvliddnen erTmaneTis orbitebs sanam ar Seejaxebodnen.
isini TandaTan
izrdebodnen, sanam dRevandeli zomebi ar miiRes.
erTerTi aseTi
giganturi SejaxebiT warmoiqmna mTvare, xolo meore
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