Goldilocks moons around binary stars

Universe Today has an interesting article up about the possibility of so-called Goldilocks moons (i.e. moons that are conducive to life) around extrasolar planets that are themselves not habitable.

Kepler 16b’s roughly circular orbit, about 65 million miles from the stars, is on the outer edge of this habitable zone. Being a gas giant, 16b is not a habitable terrestrial planet. However, an Earth-like moon, a Goldilocks Moon, in orbit around this planet could sustain life if it were massive enough to retain an Earth-like atmosphere. “We determined that a habitable exomoon is possible in orbit around Kepler-16b,” Quarles said.