Kepler-66 is a star with 1.04 times the mass of the Sun, and 0.97 times its radius. It is located 3923.53 light years away from the solar system and is estimated to be 1 billion years old, as compared to the Sun which is roughly 4.6 billion years old.
Kepler-66 is known to have 1 exoplanets in orbit around it.
Kepler-66 b was discovered by the Kepler observatory, in 2013-07, using the transit method. Its semi-major axis is 0.14 astronomical units, as compared to Earth's which is 1 astronomical unit. The mass of Kepler-66 b is 8.236 times the mass of Earth. The radius of Kepler-66 b is 2.800 that of Earth. At more than 10 Earth masses, Kepler-66 b is an ice giant, a planet that is made up mostly of volatiles like water, amonia and methane, and enveloped by a dense hydrogen and helium atmosphere, much like Uranus and Neptune in our solar system.