Astronomers used an improved version of a 250-year old equation . It could predict a total of 228 planets in the outer planetary systems . They assume there are one to two planets in the habitable zone of each . Extending equation to the entire Milky Way means there are more habitable planets in existence than previously predicted .
Astronomers used an improved version of a 250-year old equation . It helped predict a total of 228 planets in the 151 planetary systems . They believe there are one to three planets in the habitable zone of each . Extending equation to the entire Milky Way means there are more habitable worlds in existence than previously believed .