, ▁passing ▁stars ▁and ▁giant ▁mole cular ▁clouds ▁began ▁to ▁de ple te ▁the ▁cloud , ▁sending ▁com ets ▁into ▁the ▁inner ▁Sol ar ▁System . ▁The ▁evolution ▁of ▁the ▁outer ▁Sol ar ▁System ▁also ▁appears ▁to ▁have ▁been ▁influenced ▁by ▁space ▁weather ing ▁from ▁the ▁solar ▁wind , ▁mic rom eteor ites , ▁and ▁the ▁neutral ▁components ▁of ▁the ▁inter stell ar ▁medium . ▁ ▁The ▁evolution ▁of ▁the ▁astero id ▁bel t ▁after ▁Late ▁He avy ▁Bomb ard ment ▁was ▁mainly ▁govern ed ▁by ▁coll isions . ▁Object s ▁with ▁large ▁mass ▁have ▁enough ▁gravity ▁to ▁retain ▁any ▁material ▁e ject ed ▁by ▁a ▁violent ▁collision . ▁In ▁the ▁astero id ▁bel t ▁this ▁usually ▁is ▁not ▁the ▁case . ▁As ▁a ▁result , ▁many ▁larger ▁objects ▁have ▁been ▁broken ▁apart , ▁and ▁sometimes ▁newer ▁objects ▁have ▁been ▁for ged ▁from ▁the ▁rem n ants ▁in ▁less ▁violent ▁coll isions . ▁Mo ons ▁around ▁some ▁astero ids ▁currently ▁can ▁only ▁be ▁explained ▁as ▁cons olid ations ▁of ▁material ▁fl ung ▁away ▁from ▁the ▁parent ▁object ▁without ▁enough ▁energy ▁to ▁entirely ▁escape ▁its ▁gravity . ▁ ▁Mo ons ▁ ▁Mo ons ▁have ▁come ▁to ▁exist ▁around ▁most ▁plan ets ▁and ▁many ▁other ▁Sol ar ▁System ▁bodies . ▁These ▁natural ▁sat ell ites ▁origin ated ▁by ▁one ▁of ▁three ▁possible ▁mechan isms : ▁ ▁Co - formation ▁from ▁a ▁circum plan et ary ▁disc ▁( only ▁in ▁the ▁cases ▁of ▁the ▁giant ▁plan ets ); ▁ ▁Form ation ▁from ▁impact ▁de br is