The Kepler Spacecraft, which has the ability to observe distant solar systems, has discovered a rocky planet bigger than scientists ever thought was possible. Bizarre new planet is largest known rocky world, 40 times as massive as Earth The bulky object—possibly the core of a failed gas giant—challenges what astronomers think about how planets … Astronomers have confirmed the presence of five planets and have alluring evidence of two more. Nearly 700,000 times heavier than Earth. Meet BD+20594b. Astrophysicists using the Kepler Spacecraft have discovered the largest rocky planet yet: BD+20594b is 16 times as massive as Earth. It’s too faint to see with the naked eye, but a team led by astronomers from Goddard and San Diego State University, used NASA's Kepler Space Telescope to identify the new planet. It is located outside the solar system, 170 light-years away from Earth and is 13 times larger than Jupiter, the largest planet in our solar system. The planet, named BD+20594b, is an estimated 2.23 times the radius of Earth and 16.3 times its mass. If confirmed, this would be among the largest rocky planets we’ve ever found. HD 100546 - Wikipedia The reason it is so big is that it is extremely young for a planet, less than 10 Mya. The largest exoplanet ever discovered is also one of the strangest and theoretically should not even exist, scientists say. Scientists recently discovered the hottest planet ever found – with a surface temperature greater than some stars. At 6.9 Jupiter radii, it dwarfs everything else that we currently know of. Meet BD+20594b. Twice the mass of the Sun. The largest known planet so far is HD 100546 b. It was first named "Kappa Andromedae B" but it is colloquially known as "Super-Jupiter". Dubbed TrES-4, the planet is about 1.7 times the size of Jupiter and belongs to a small subclass of so-called puffy planets that have extremely low densities. 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