More than half of all stars similar to the Sun located in the Milky Way, may have habitable planets. So do the astronomers believe according to the results of a new study, which, not without reason, suggests that our Galaxy may have hundreds of planets similar to the Earth. And they can be inhabited. On average, each Sun-like star can have up to 9 rocky planets in its so-called habitable zone.
It is the range of the orbital distances where liquid water can be stable on the surface. Almost 7% of the 200 billion stars in the Milky Way are G-dwarfs. Jeff Coughlin, an exoplanet researcher at SETI, believes that this is the first time that all the pieces were brought together to provide a clear measurement of potentially habitable planets in the Galaxy.
The scientists say that with the new data, they are one step closer on the long journey to figuring out if humans are alone in space. A large amount of new data was transferred to the scientists by the Kepler spacecraft mission. The satellite worked from 2009 to 2018 and during this time it has discovered over 2.8 thousand exoplanets.
And the number of new planets of this type continues to increase as the scientists continue to discover new data from the rover during the mission. The discovered rocky planets, similar to the Earth, the scientists identified as the worlds with diameters from 0.5 to 1.5 times the diameter of our planet.
And the stars similar to the Sun are like objects with a surface temperature of 10,880 degrees Fahrenheit. Most of the stars that fit these categories are G, that is, dwarfs. The scientists calculated the approximate frequency of occurrence of the habitable zone from 0.37 to 0.60 planets per star for the first and from 0.58 to 0.88 planets per star for the second.
But both ranges have a lot of uncertainty. Nevertheless, they imply that the earthly worlds can be located in the Galaxy, practically on the border of the Solar System. The scientists estimated with a 95% chance that the nearest G planet could be within 10 parsecs of the Sun. And the closest world in the Solar System is Proxima b that orbits the red dwarf Proxima Centauri.