Landsat Celebrates 40th Anniversary
![Landsat Celebrates 40th Anniversary](https://media2.spaceref.com/news/2012/ooLDCM.jpg)
Landsat at 40.
NASA
The Newseum in Washington, DC hosted a look back and ahead at the contributions of the Landsat program to our understanding of the Earth on the 40th anniversary of the Landsat on July 23.