Complex sentence: Luhman 16 is a binary brown dwarf located in the southern constellation Vela at 6.6 light-years from the Sun, making these the nearest known brown dwarfs to the Solar System, and the closest system discovered since Barnard's Star in 1916.
Split into simpler sentences: Luhman 16 is a binary brown dwarf system found in the southern constellation Vela. About 6.6 light-years distant from the solar system, they are the closest known brown dwarfs, and the closest system found since the discovery of Barnard's Star in 1916.