Now European Southern Observatory (ESO) thinks one of the objects floating along the main belt might be the smallest dwarf planet in our solar system — an asteroid known as Hygiea. Hygiea isn ...

The nearest single star to the sun, Barnard’s star, has a brood of planets all its own. The red dwarf star, about six light-years from Earth, hosts four close-in planets each about two to three ...

In a breakthrough just six light-years from home, scientists have found four rocky exoplanets circling Barnard’s Star — our solar system’s closest solitary neighbor after Alpha Centauri.

According to the astronomers, these exoplanets — which are among the smallest ever discovered — could force us to reevaluate our understanding of how planets form and evolve. The four planets ...