The Landsat 9 Earth Satellite | NASA's Goddard Space Flight Center FriendsofNASA.org: For over 50 years, the Landsat program has provided the longest continuous satellite record of Earth's land surface from space. Landsat 9, launched in 2021, is the latest mission in this remarkable legacy—building on decades of Earth observation with upgraded technology, including enhanced radiometric resolution, improved signal-to-noise performance, and polar night thermal imaging. Working in tandem with Lands