Ajit Pai @AjitPai
OTD in 1930, Clyde Tombaugh compared photos of a star field taken 6 days apart. He noticed a dim object moving against the backdrop of stars. He'd discovered Pluto, the 9th planet in our solar system (until its 2006 demotion to dwarf planet by @IAU_org). https://t.co/gBvCAb7H2B https://t.co/bT4HAf5cjH — PolitiTweet.org