
NASA @NASA
Since 1972, #Landsat satellites have given us a global perspective of how Earth is changing — and decades of data available to the public for free. Dive into the program's history as the next satellite, Landsat 9, prepares for launch Sept. 16: https://t.co/BUc1Z7PnYb https://t.co/XIEwKOF9Yf — PolitiTweet.org