A spy satellite is a type of satellite used for intelligence gathering and surveillance. These satellites orbit the Earth and capture high-resolution images and data about various locations. They play a crucial role in national security by monitoring military activities, natural disasters, and environmental changes. Spy satellites are equipped with advanced sensors and cameras that can detect objects on the ground with great precision. They are often operated by government agencies, such as the National Reconnaissance Office in the United States, and provide valuable information for decision-making and strategic planning.