By now every day they discover habitable exoplanets, such as the so-called “super-terme”, the exoplanet HD 20794 D, which orbit around a star almost twenty light years from us. In astronomical terms it is very close, but we will never get there, but we can study it. Although, according to the studies of the University of Geneva, orbits between the habitable area (where there may be water in the liquid state) and the uninhabitable one. I said that we will never get there, but a question that is often asked by those who care little about cosmic distances is: “Well, who knows, tomorrow …”.
Tomorrow we will never be able to overcome, but not even to get closer to the speed of light, simply because a photon has no mass, for this reason it can travel to three hundred thousand kilometers per second (and to get on this super earth even the light takes twenty years) . A spatial ship, even traveling, assume, to a tenth of the speed of light (already a science fiction speed), it would take two hundred years.
The voyager probes, launched in the seventies, and as soon as they left our sun system, to reach Proxima Centauri, to “only” 4 years light away, and going to 61500 km per hour, would arrive there in about one hundred thousand years. This is so much to give an idea of the distance. The point is that on HD 20794 d, in any case, is that by orbit for a period in the area and for another in the non -habitable one, there may be life, but also not (or of the forms of life that manage to resist the extreme conditions, such as Tardigradi). Life and not life no, otherwise it would be Schrödinger’s super land.
I don’t think we will be able to know only by observing it (who knows, perhaps yes), but we think that of
Esopianeti, that is, planets around other stars, we have been discovering thousands for only twenty years. First we were taken for granted, but we had no evidence. Before even Giordano Bruno said it, and we know how it ended.