Borucki, William J., Agol, Eric, Fressin, Francois, Kaltenegger, Lisa, Rowe, Jason, Isaacson, Howard, Fischer, Debra, Batalha, Natalie, Lissauer, Jack J., Marcy, Geoffrey W., Fabrycky, Daniel, Désert, Jean-Michel, Bryson, Stephen T., Barclay, Thomas, Bastien, Fabienne, Boss, Alan, Brugamyer, Erik, Buchhave, Lars A., Burke, Chris, Caldwell, Douglas A., Carter, Josh, Charbonneau, David, Crepp, Justin R., Christensen-Dalsgaard, Jørgen, Christiansen, Jessie L. et al. 2013. "Kepler-62: A Five-Planet System with Planets of 1.4 and 1.6 Earth Radii in the Habitable Zone." Science 340:587-590. https://doi.org/10.1126/science.1234702
We present the detection of five planets—Kepler-62b, c, d, e, and f—of size 1.31, 0.54, 1.95, 1.61 and 1.41 Earth radii (R?), orbiting a K2V star at periods of 5.7, 12.4, 18.2, 122.4, and 267.3 days, respectively. The outermost planets, Kepler-62e and -62f, are super–Earth-size (1.25 R??) planets in the habitable zone of their host star, respectively receiving 1.2 ± 0.2 times and 0.41 ± 0.05 times the solar flux at Earth’s orbit. Theoretical models of Kepler-62e and -62f for a stellar age of ~7 billion years suggest that both planets could be solid, either with a rocky composition or composed of mostly solid water in their bulk.