'Cloud Planet' Appears Among Cygnus Constellation, Could Be Habitable
Kepler-51 belongs to a class of giant worlds known by fairy-tale names like'Extraterrestrial' exoplanet discovered as dense as cotton candy
Astronomers found nearly 15 exoplanets in the Kepler 51 star system with a density of less than 0.1 grams of matter per cubic centimeter.