An exoplanet at least half the mass of Venus orbits Barnard’s star, the closest single star to the Sun, once every 3.15 days. An artist’s impression of Barnard b. Image credit: ESO / M. Kornmesser. Barnard’s star is a 10-billion-year-old red dwarf star located in the constellation of Ophiuchus. At nearly 6 light-years away, it is the next closest star to the Sun after the Alpha Centauri triple stellar system. Otherwise known as Gliese 699 or...
