The IAU demoted our beloved Pluto to dwarf planet status #OTD in 2006. Never forget.

(Image: NASA/Johns Hopkins APL/SW Research Institute) pic.twitter.com/4Ngw9tb9ZW

— Robert McNees (@mcnees) August 24, 2017

A bit of Pluto pic.twitter.com/dwRXSRJ28x

— Bits of Pluto (@bitsofpluto) October 10, 2017

This is a podcast about New Horizons that I recorded early last fall for NASA-- Enjoy! #PlutoFlyby pic.twitter.com/OYLERApHsQ

— AlanStern (@AlanStern) January 25, 2018

Chasing the elusive MU69. This will be *by far* the most distant world ever explored. @NewHorizons2015 will be there next New Year's Eve! https://t.co/QG95rlgzqA pic.twitter.com/BMq7x7sba2

— David Grinspoon (@DrFunkySpoon) February 16, 2018

THIS JUST IN! New Horizons has sent a green beacon back from the Kuiper Belt-- all's well aboard our intrepid explorer! #PlutoFlyby pic.twitter.com/cC5gfw3A7h

— AlanStern (@AlanStern) February 19, 2018

"#NASA just released the #best close-up of #Pluto we will have for decades to come" #space #cosmos #universe pic.twitter.com/MH9HDWsnOL

— Step_Holt (@Step_Holt) February 24, 2018

A reminder that @NewHorizons2015 is observing ~20+ Kuiper Belt objects leading up to the MU69 flyby (& beyond!) https://t.co/MUqvkXSv1K
Here's the first such paper from 2016, @AscendingNode et al. https://t.co/nigdq5mZoa

— Michele Bannister (@astrokiwi) February 28, 2018

And on this historic anniversary of the announcement of Pluto's discovery our next New Horizons flyby target 2014 MU69 just got a nickname! Welcome Ultima Thule everyone! (Or Ultima for short!) https://t.co/9stksXU7Fd Hope you like it! #PlutoFlyby pic.twitter.com/KJOwnI320T

— AlanStern (@AlanStern) March 13, 2018

My book about the 26-year saga of how we explored Pluto will published on May 1st! It describes the whole project--the good, the bad, the ugly & the wonderful!

We want adance sales to soar so if you’re interested, scroll down, click & order! RTs PLEASE! https://t.co/6dMomu39EC pic.twitter.com/9Sc4GvZnrM

— AlanStern (@AlanStern) April 2, 2018