Judging by the findings of a new study, planets like Earth have had water since its inception. The discovery drops “crashing” encounters with meteorites and raises the possibility that the Milky Way is full of other “Earths”.
The scientific community has been searching for extraterrestrial life for a long time, but with no signs of what can give it origin – liquid water – nothing done. So far, the scenario for such a possibility has presupposed “immediate encounters” with large meteorites, but a new study raises a different hypothesis.
A team from the University of Copenhagen argues that planets such as Earth, Venus, or Mars may have been created from small particles of dust formed by ice and carbon.
In the model developed by the researchers, such planets would have water since their formation, which leaves open the possibility of other “Milky Way” Earths outside.
“All of our data suggest that water was part of the building blocks of the Earth, from the beginning. And because the water molecule occurs frequently, there is a reasonable likelihood that it will apply to all the planets in the Milky Way, ”says Anders Johansen, who led the study now published in the journal Science Advances.
“The decisive point for whether liquid water is present is the distance from the planet to its star,” added the researcher.
Using a computer model, it was calculated how quickly planets are formed from these building blocks, consisting of millimeter particles of ice and carbon dust – orbiting around all the young stars in the Milky Way – and that there are 4.5 billion years have accumulated in the formation of what would later become Earth.
Anders Johansen explains that the water molecule H2O is found throughout the galaxy and that the theory, therefore, opens up the possibility that other planets may have had the same origin as Earth, Mars, and Venus.
“There is a possibility that all the planets in the Milky Way are formed by the same building blocks, which means that planets with the same amount of water and carbon as Earth – and therefore potentially places where life may exist – can occur frequently around other stars in our galaxy, as long as the right temperature has been provided ”, adds the researcher.
Source: journal Science Advances