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In favor of illustration, if Kepler were 1,000 light years from Earth and looking on our sun and noticed Venus cursory by, theres simply a one-in-eight ability with the purpose of Earth would additionally ensue seen, astronomers understood.To pick up the estimate intended for the entire numeral of planets, scientists in that case took the frequency practical already and functional it to the numeral of stars all the rage the cloudy Way.used for many years scientists figured here were 100 billion stars featuring in the chalky Way, but endure day a Yale scientist figured the run to was closer to 300 billion stars.Either way it shows to facilitate Carl Sagan was acceptably what time he talked of billions and billions of worlds, assumed retired NASA astronomer Steve Maran, who praised the investigate but wasnt part of it.And thats merely our galaxy. Scientists stature present are 100 billion galaxies.