Earlier, on September 15, 2011, Kepler had spotted its first confirmed single planet orbiting two stars: Kepler-16b. And on January 11, 2012, it discovered two more double-sun planets: Kepler-34b and Kepler-35b. (We'll be quizzing you on these planet names, so we hope you're taking notes.)
But if two stars aren't enough for you, how about four? On October 15, 2012, a joint effort between scientists and amateur astronomers with the Planet Hunters project tapped data from Kepler to discover PH1, the first known planet orbiting a double-star that itself is orbited by a distant pair of stars.
But let's not get greedy. In the above image, we see Kepler-47c in the foreground and Kepler 47b in the distance, with their two suns glowing in the middle. The foreground planet is a gaseous giant, inhospitable to life, but just for the sake of discussion, let's ask the following question:
If future generations of humans were to somehow colonize Kepler-47c, would they go for an evening stroll and see...
May 19, 2013 12:01 AM PDT
Photo by: NASA/JPL-Caltech/T. Pyle
| Caption by: Edward Moyer
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