Kepler-11 is the fullest, most compact planetary system yet discovered beyond our own. NASA's Kepler space telescope discovered six planets made of a mix of rock and gases orbiting a yellow dwarf star, located approximately 2,000 light-years from Earth. The orbits of the five inner planets in the Kepler-11 planetary system are much closer together than any of the planets in our solar system. If placed inside our solar system, Kepler-11g would orbit between Mercury and Venus, and the other five planets would orbit between Mercury and our sun. The innermost planet, Kepler-11b, is 10 times closer to its star than Earth is to the sun. All six planets are larger than Earth, with the largest comparable in size to Uranus and Neptune.