The second planet is about 12 times that of Earth, seventeen million miles from its star, and has an equally swift orbit measured at only around 32 days. It also appears to have a rocky core.
The outermost planet orbits in about 197 days in what’s referred to as the “habitable zone” where its distance from its sun (60 million miles compared to Earth’s 93 million), available light, and approximate temperature might support life. In fact it’s the smallest planet to date yet found within such a zone. It is about 18 times the mass of the earth and has a rocky core with possible ice on the surface, but is shrouded in a thick and high-pressure atmosphere possibly made up of mostly hydrogen. It’s improbable that life could exist there however, because the massive gravitational field and atmospheric pressure would crush it even down to a mere cell’s level.
David Charbonneau of Harvard University is quoted as saying, "The architecture of this particular planetary system bears some intriguing similarities to that of our own solar system."
The system is also interesting because it’s the first one discovered not to have a gas giant such as Jupiter orbiting it.