Kepler-186f is the very first exoplanet that is both the size of our own world and in the habitable zone surrounding its star. SETI Institute scientist Elisa Quintana is lead author of the paper announcing its existence. Emily Lakdawalla describes several books about Curiosity, the Mars Science Laboratory, including her own work in progress. Bill Nye revisits a big science story that has become a tale of how science works so well. Bruce Betts is Principal Investigator for LIFE, the Living Interplanetary Flight Experiment, just chosen by NASA for study that may lead to inclusion on the Asteroid Redirect Mission. We’ve also got another Planetary Radio t-shirt for the winner of this week’s space trivia contest.
NASA / Ames / JPL-Caltech / T. Pyl
Kepler-186f: A Second Earth
The artist’s concept depicts Kepler-186f, the first validated Earth-size planet orbiting a distant star in the habitable zone—a range of distances from a star where liquid water might pool on the surface of an orbiting planet. Kepler-186f resides in the Kepler-186 system about 500 light-years from Earth in the constellation Cygnus. The discovery of Kepler-186f confirms that Earth-size planets exist in the habitable zone of other stars and signals a significant step closer to finding a world similar to Earth.