Are there other planets in the universe besides the ones in our solar system?
Are there other planets in the universe besides the ones in our solar system? Exoplanets are planets beyond our own solar system. Thousands have been discovered in the past two decades, mostly with NASA's Kepler Space Telescope. These worlds come in a huge variety of sizes and orbits. Some are gigantic planets hugging close to their parent stars; others are icy, some rocky. Are there planets outside of galaxies? Astronomers say they have found evidence for the first time of a planet orbiting a star outside our Milky Way galaxy. The evidence was observed by a telescope operated by the...