Experiments suggest red spot on Pluto may have come about from impact that formed Charon

(Phys.org)--A combined team of researchers from several institutions in Japan has found evidence that suggests Pluto's distinctive red spot may have developed after a massive collision with a comet or other object. In their paper published in the journal Nature Astronomy, the researchers detail experiments they conducted that showed that the red spot on Pluto may have come about due to pools that developed on the dwarf planet's surface after a collision.