NASA @NASA
The @NASAWebb Telescope will allow us to see out to 13 billion years of cosmic time! Join our experts live now as they discuss the infrared telescope’s recent cryogenic testing & next steps ahead of a 2019 launch: https://t.co/3ZAalc4x3k Have questions? Use #askNASA https://t.co/x22jbkbLSW — PolitiTweet.org