Low Earth orbit (LEO) satellites are spacecraft that orbit the Earth at altitudes ranging from about 100 to 2,000 kilometers. They travel at high speeds, completing an orbit in approximately 90 to 120 minutes. This proximity to Earth allows them to provide services like satellite internet, weather monitoring, and Earth observation with lower latency and higher resolution. LEO satellites are often used in constellations, which are groups of satellites working together to cover larger areas and provide continuous service. Notable examples include the Starlink constellation by SpaceX and the OneWeb network, both aimed at delivering global internet coverage.