In the solar system the habitable area would go from a little before the orbit of Venus to beyond the orbit of Mars, it could easily reach the asteroid belt because for liquid water to exist on the surface of a planet it is also essential that it have an atmosphere and a planet located between the orbits of Mars and Jupiter, if it had an atmosphere with a higher proportion of greenhouse gases than that of the Earth, could have high temperatures for life.
Beyond that things get very complicated. Jupiter is considered to be on the snow line, which is what is technically called the border where the heat of the star in our case the sun is not enough for compounds such as water, ammonia, methane, carbon dioxide to be in gaseous or liquid form in the case of water, but they freeze, they are in solid form, which is why almost all of Jupiter's moons have a large icy crust which is not inconvenient either. for life to arise in them, because underneath we know that water exists, the latest case is that of Calisto, where there is an ocean of liquid water and with much more water, for example, than what the Earth has.
We know that liquid water exists on the moons of Jupiter, on Europa, on Ganymede and on Callisto and they are moons of significant size. In fact, Ganymede is larger than Mercury and Callisto, which is around there or very close to the size of Mercury.
In how many stars similar to the Sun could we find worlds similar to the Earth in the habitable area of its star? According to the calculations of the latest research that was presented in May of last year, it would be in almost one of every five stars similar to the Sun. This means that in our galaxy alone there are about 6,000 million potential earths, if we take into account that life on Earth emerged relatively soon, Luca, which is the name of the first living being from which we all descend, from the ant to the elephant, from the oak to the humans, Luca emerged 4.2 billion years ago, about 400 million years after the formation of the planet. That's very early.
At that time we know and are certain that Mars had the same climatic conditions with water and organic matter as those on Earth and perhaps Venus, although we still do not have enough evidence for Venus, we would have to send ships and explore the surface to analyze the rocks, it is difficult to study Venus because of its tremendous atmosphere that covers it, but we do know about Mars. It had water for at least 1 billion years and at that time why didn't life emerge on Mars, or is it that maybe we haven't been able to find it? still.
So the chances of life or some type of life arising on many of those 6 billion planets is very high, it is purely statistical, I have no proof, but purely statistically There are 6 billion possibilities and at least on Earth the possibility arose quite early. Why? could not have arisen in some of those 6 billion worlds, now the complex life that would have evolved into a complex higher life, I am no longer saying a life with intelligent and technologically advanced beings, the technological must always be put first because keep in mind that the Egyptians or the Sumerians were also intelligent, but they did not have technology to communicate with space, nor did they have space technologies and there are levels in terms of a civilization but no one disputes that they were intelligent and that they had set up their own civilization.
That is why the evolution from bacteria to complex life is complicated, we do not know what steps, we must follow because the Earth also took a long time for complex life to emerge, we do not know at what speed the evolution is going, maybe there are other speeds here going from the life of bacteria to complex life was approximately 2,000 million years, or 3,000 million it depends because there is recent research that says that they have discovered precursors of complex life earlier than those known before, but well it was several billion years, but in other worlds perhaps things were faster and instead of billions of years complex life was spent in just a few hundred million years.
Practically all the life that we know now, animals and plants and insects, dates back only 400 to 500 million years and comes from a common ancestor. It is right now that the beginning of complex life is marked, at least from the one we descended from. There is research that claims to have discovered previous complex life but apparently it was unlucky, it became extinct. It is a discovery they made in central Africa.
What exactly happened? Why didn't it prosper? Why did it not spread across the planet? It is still a mystery as well. It is possible that life on Earth was lucky. It is possible that extinctions are something more common in the universe than we think. Other worlds could have suffered extinctions that annihilated life on them or reduced it to simple bacteria without the impossibility of evolving. It is possible that they have suffered the effects of what they have called the effects of a cosmic anomaly.
! The truth will set us free and science is the one that is closest to the truth!
Thank you for visiting my blog. If you like posts about #science, #planet, #politics, #rights #crypto, #traveling and discovering secrets and beauties of the #universe, feel free to Follow me as these are the topics I write about the most. Have a wonderful day and stay on this great platform :) :)
Thanks for your contribution to the STEMsocial community. Feel free to join us on discord to get to know the rest of us!
Please consider delegating to the @stemsocial account (85% of the curation rewards are returned).
You may also include @stemsocial as a beneficiary of the rewards of this post to get a stronger support.