For one reason or another, some people are still upset about Pluto's demotion from planet to dwarf planet ... and everything else about life in the universe. Follow StarTalk Radio on Twitter ...

Small, cold, and absurdly far away, Pluto has always been selfish ... had swept through the realm of the giant planets and revealed the real mass of Neptune. When that number, which is the ...

Nitrogen is heated and cooled as Pluto rotates. A New Horizons image of Pluto and its moon Charon revealed more surprises about the dwarf planet and ... This would be a real turn-up for the ...