What is Satellite?

A satellite is an object that orbits another object in space. Satellites can be natural, like the Moon orbiting the Earth, or artificial, like the many satellites launched by humans for communication, navigation, observation, and scientific research. Communication satellites relay television, telephone, and internet signals around the world. Navigation satellites, like those in the Global Positioning System (GPS), help people and vehicles determine their location. Earth observation satellites monitor weather, map terrain, and track environmental changes. Scientific satellites are used to study space and celestial bodies.