Remote sensing is the science of obtaining information about objects or areas from a distance, typically from aircraft or satellites. It involves detecting and measuring radiation of different wavelengths reflected or emitted from distant objects or materials, which can then be used to observe and analyze the Earth's surface and atmosphere.

This technology is widely used in various fields such as agriculture, forestry, geology, hydrology, and environmental monitoring. By providing valuable data on land use, vegetation health, soil moisture, and other critical parameters, remote sensing plays a crucial role in understanding and managing natural resources and environmental changes.