Circa 2013
Enlarge | +
Artist’s representation of the “habitable zone,” the range of orbits where liquid water is permitted on the surface of a planet. The authors find that 22% of Sun-like stars harbor a planet between one and two times the size of Earth in the habitable zone. (Credit: UC Berkeley)
One in five stars in our galaxy like the Sun have planets about the size of Earth and a surface temperature conducive to life, astronomers at UC Berkeley and University of Hawaii, Manoa now estimate.
The estimate was based on a statistical analysis of all the Kepler observations of NASA’s Kepler space telescope of the 200 billion stars in our galaxy.
Read more
Comments are closed.