A satellite is an object that orbits around a larger celestial body, such as a planet or moon. Satellites can be natural (like the Moon) or artificial (man-made).
Related terms
Gravity: The force that keeps the satellite in orbit by pulling it towards the center of the Earth.
Geostationary Orbit: A specific type of satellite orbit where the satellite stays fixed above one location on Earth's surface.
Hubble Space Telescope: An example of an artificial satellite used for astronomical observations.