A trio of Earths 40 light years away?
Let’s imagine now that these planets cross this ice line but that they do not get too close to the star. The ice is not exposed to temperatures that are so high they would sublimate it or cause an outgassing that would dry up the planets as a result. “At a good distance”, summarize the two researchers, “this ice can melt and form oceans. The two first planets are at the limit of the habitable zone. They are too close to the star. But models have shown that they could harbor habitable regions in the western limb between their day and night sides”. The heat is not distributed in a homogenous way on these planets. The proximity of their star traps them in a state known as synchronous rotation. Like the Moon with the Earth, they always show the same hemispheres, the day side, which is a lot drier than the night side. The prevailing winds, which are too hot to keep water in the liquid state, have a tendency to blow towards the east, preserving a milder region and also brighter than in the west. The third planet seems even more promising and could be totally inhabitable.
A veritable Eldorado