NASA @NASA
As @NASAWebb gets ready for action, its Mid-Infrared Instrument (MIRI) has reached a temperature of less than 7 kelvins (−447°F or −266°C). This helps MIRI detect the faintest of infrared signals. More of super cool Webb: https://t.co/BL42IeOWL1 https://t.co/Pa1A1DohWr — PolitiTweet.org