As an astronomer, the question I hear the most is why isn’t Pluto a planet anymore? More than 10 years ago, astronomers famously voted to change Pluto’s classification. But the question still comes up.
NASA Administrator Jim Bridenstine declared Pluto a planet again in a video this week. I’m assuming Bridenstine was half-joking, since there is someone laughing in the background, and I think I see a smirk on his face. But now is as good a time as any to discuss the complicated…
New Horizons mission scientists have released the first peer-reviewed results from their study of 2014 MU69, demonstrating just how “pristine” this object is.