... Star Atlas . ... galaxies . ... Astronomers estimate that at least 100 billion planets populate the galaxy . ... The team made its estimate while analyzing planets orbiting a star called Kepler-32 т?? planets that are representative, they say, of the vast majority in the galaxy and thus serve as a perfect case study for understanding how most planets form. т??Thereт??s at least 100 billion planets in the galaxy т?? just our galaxy,т?? said John Johnson from Caltech. т??Thatт??s mind-boggling.т?? . ...