Summary:

- NASA's Landsat program has been taking pictures of the Earth from space for over 50 years. The latest Landsat satellite, called Landsat 9, was launched in 2021 to continue this important work.

- Landsat satellites help scientists and researchers study how the Earth is changing over time. They can see things like deforestation, urban growth, and the melting of glaciers and ice sheets.

- NASA is already working on the next generation of Landsat satellites, called Landsat Next, which will have even better cameras and sensors to give us an even clearer picture of our planet.