The Landsat program is a series of Earth-observing satellites that provide detailed images of the planet's surface. Launched in 1972, it is a joint initiative of the U.S. Geological Survey and NASA. The program helps monitor land use, agriculture, forestry, and environmental changes over time. Each Landsat satellite captures data in multiple spectral bands, allowing scientists to analyze various features like vegetation, water bodies, and urban development. The program has been crucial for research in climate change, disaster management, and resource management, making it a vital tool for understanding our planet.