Entire planetary system of four tiny exoplanets found orbiting the nearest single star to the sun

Astronomers have discovered four planets that are just a fraction of the mass of Earth orbiting Barnard’s Star, which is 6 light-years from Earth.

​ Astronomers have discovered four planets that are just a fraction of the mass of Earth orbiting Barnard’s Star, which is 6 light-years from Earth. Read More Breaking News, Latest News and Videos | CNN