▁a ▁planet ▁completely . ▁However , ▁the ▁star ' s ▁loss ▁of ▁mass ▁could ▁send ▁the ▁or bits ▁of ▁the ▁surv iving ▁plan ets ▁into ▁cha os , ▁causing ▁some ▁to ▁col lide , ▁others ▁to ▁be ▁e ject ed ▁from ▁the ▁Sol ar ▁System , ▁and ▁still ▁others ▁to ▁be ▁torn ▁apart ▁by ▁tid al ▁interactions . ▁After wards , ▁all ▁that ▁will ▁remain ▁of ▁the ▁Sun ▁is ▁a ▁white ▁d war f , ▁an ▁extra ordin arily ▁dense ▁object , ▁ 5 4 % ▁its ▁original ▁mass ▁but ▁only ▁the ▁size ▁of ▁the ▁Earth . ▁Initial ly , ▁this ▁white ▁d war f ▁may ▁be ▁ 1 0 0   times ▁as ▁l umin ous ▁as ▁the ▁Sun ▁is ▁now . ▁It ▁will ▁consist ▁entirely ▁of ▁deg ener ate ▁carbon ▁and ▁o xygen , ▁but ▁will ▁never ▁reach ▁temper atures ▁hot ▁enough ▁to ▁f use ▁these ▁elements . ▁Thus ▁the ▁white ▁d war f ▁Sun ▁will ▁gradually ▁cool , ▁growing ▁dim mer ▁and ▁dim mer . ▁ ▁As ▁the ▁Sun ▁dies , ▁its ▁gravit ational ▁pull ▁on ▁the ▁orbit ing ▁bodies ▁such ▁as ▁plan ets , ▁com ets ▁and ▁astero ids ▁will ▁weak en ▁due ▁to ▁its ▁mass ▁loss . ▁All ▁remaining ▁plan ets ' ▁or bits ▁will ▁expand ; ▁if ▁Ven us , ▁Earth , ▁and ▁Mars ▁still ▁exist , ▁their ▁or bits ▁will ▁lie ▁roughly ▁at ▁, ▁, ▁and ▁. ▁They ▁and ▁the ▁other ▁remaining ▁plan ets ▁will ▁become ▁dark , ▁fr ig id ▁h ul ks , ▁completely