NASA @NASA
Happy 20th launch-iversary, @chandraxray! The space telescope blasted off to space on the Space Shuttle Columbia #OTD in 1999. In the two decades that have passed, its X-ray eyes have changed our view of the cosmos: https://t.co/bd1CmEyfFu https://t.co/tGh1tsW3e1 — PolitiTweet.org