Radio 4 in Four - How Pluto was stripped of its status as a planet - ÃÛÑ¿´«Ã½ Sounds

Radio 4 in Four - How Pluto was stripped of its status as a planet - ÃÛÑ¿´«Ã½ Sounds
How Pluto was stripped of its status as a planet
Neil deGrasse Tyson explains how Pluto was downgraded to the status of dwarf planet.