Ex­o­plan­ets in the uni­verse

Some are much more com­mon than oth­ers

All About Space - - Our Odd Solar System -

Hot Su­pert­er­rans

Up to 2.5-times the ra­dius of the Earth, these plan­ets or­bit much closer to their star, and so have lost most of their early at­mos­phere to so­lar evap­o­ra­tion.


Hot Nep­tu­ni­ans Nep­tu­ni­ans have a rocky core, and are up to 50-times the mass of Earth, but also have a thick at­mos­phere of hy­dro­gen and helium.


Hot Ter­rans

Roughly the same size as Earth, but be­cause they are in the hot zone, liq­uid wa­ter is not present on the ex­o­planet's sur­face.


Hot Jo­vians

Once thought un­likely, it now seems that more than 65 per cent of Jupiter-sized plan­ets form in their star’s hot zone.


Warm Su­pert­er­rans Plan­ets in the hab­it­able zone only ac­count for about 1.4 per cent of those dis­cov­ered so far, and the ma­jor­ity of them are larger than our home planet.


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