It wasn’t NASA tho - it was the International Astronomical Union (IAU):

NASA’s New Horizons mission made a close pass of Pluto this week. For more than 70 years, Pluto was one of nine planets recognised in our Solar System.

But in 2006, it was relegated to the status of dwarf planet by the International Astronomical Union (IAU). So why was Pluto demoted?

https://www.bbc.com/news/science-environment-33462184

Nothing can warm up Pluto's cold, dead(ly) heart.

So much fuss about a glorified asteroid.

"do you think that Pluto gives a shit? Pluto's not gonna quit, cos Pluto knows what Pluto is. And he knows that Pluto's HOT SHIT" -Tom Cardy

Always "Pluto, Pluto, Pluto". Why does no one ever remember Ceres, Eris, Haumea, and Makemake? They're each as much of a "planet" as Pluto is.

Heart? No, it actually looks like Disney's Pluto...

I thought this said "Heart of rice" and the rest about Pluto got pretty confusing

Three sizes too small