While there are many doubts about the existence or not of extraterrestrial life in other solar systems, what does seem evident is that in our own solar system we are completely alone, at least when it comes to intelligent life.
But our galaxy is immense, and is home to a multitude of other solar systems, and exoplanets very similar to Earth, which could perfectly harbor life, a life that could even be very similar to ours, and that is the worst news.
And the teacher Jane Greaves from Cardiff University, has identified exoplanets that could exist in our own galaxy, the Milky Way, and that they would be orbiting stars 70 and 110 light years awayand that’s a lot.
”These stars are much older than the Sun (about 8 billion years), which means that all the planets have had time to become less radioactive,” he said.
“That puts their (hypothetical) planets at an age in which the amount of rock that needs to be heated and the radioactive heat available are in a similar balance to that of Earth when its continents appeared,” he explains.
Considers that the scientific community should take a look at this type of exoplanets to see if these rocky worlds really exist, and if they have continents, for example.
These two stars called HD 76932 and HD 201891 were born in the ancient past of the galaxy, and they could even have biospheres more advanced than our own planetand that is a huge advantage for other civilizations.
Exoplanets orbiting these stars They may have a 5 billion year head start on life on Earthand that would ensure that they would be more advanced than us, with the risk that that would entail.
He adds that if astronomers could find evidence of stellar abundances of thorium and potassium in these distant solar systems, it could help us focus on exoplanets with land masses similar to ours, but much older.
Although many astronomers consider that, if advanced extraterrestrial life existed in other solar systems, it would be very similar to our evolution.