As many as six billion Earth-like planets in our galaxy, according to new estimates
Tuesday, June 16, 2020 - 10:00
in Astronomy & Space
To be considered Earth-like, a planet must be rocky, roughly Earth-sized and orbiting Sun-like (G-type) stars. It also has to orbit in the habitable zones of its star—the range of distances from a star in which a rocky planet could host liquid water, and potentially life, on its surface.