We are the aliens
What if we were the aliens? According to recent theoretical study made by a team of Nasa researcher lead by professor Peter Behroozi, when our solar system was born, about 4.6 billion years ago, already existed only 8% of Earth-like planets, then potentially habitable, that will ever form in this universe. This does not necessarily mean that human civilization is now the only one in the universe or that never existed others, but that humanity may have some benefits.
JUST 8% OF STARS AND PLANETS ALREADY FORMED
The interesting thing is that, according to the latest calculations carried out by data collected by Hubble and Kepler space telescopes, when the Sun burns out in about another 6 billion years, the bulk of potentially habitable planets which still will form it will be of a little dropped below the 92% of the estimated total. If the calculations of Behroozi are correct human civilization could be one of the first, if not the first, to have formed in the universe and therefore it could have in front of itself many billion years to subsequently evolve and to explore the universe (if it not self-destruct before). The alien ones in this case we would be us.
Not only: data show how the universe was making stars and planets at a fast rate 10 billion years ago, but with a very low fraction of the universe’s hydrogen and helium gas that was involved in the process, while now stars and planets birth is happening at a much slower rate than long ago, but there is so much leftover gas available that the universe will keep creating up stars and planets for a very long time to come. Actually the last last star isn’t expected to burn out until about 100 trillion years from now.
MANKIND AMONG THE FIRST “ALIENS” OF THIS UNIVERSE
This also means that the human civilization, having already developed telescopes and radiotelescopes, has been able to study and to understand the origin of the universe, while in a distant future, let’s say 1 trillion years from now, a possible new civilization would no longer be able to do so, because every trace would have faded away for a long time. Being one of the first civilizations and one of the few to be able to exactly understand how was formed and how the universe works will allow the human race to finally expand among the stars and to succeed in finding new civilizations on planets far away from the Earth?
It could seem the dream of Star Treek that comes true, but the Nasa scientists seem now less sceptics to this respect: indeed we could have after all a great advantage on the civilizations that had to rise among some million years in the Milky Way, where according to the latest estimates there should be 1 billion Earth-sized worlds, a good portion of them presumed to be rocky, or in some of the other 100 billion galaxies spread in the observable universe. We have only to find the way to travel in the space and maybe in the time.