satellite
n. countablen. an object that moves around a planet or a star in space. It can be a natural object like the moon or a machine sent up by people to send signals or take pictures.
n. a celestial body orbiting a planet or an artificial object placed in orbit around a planet or star to collect information or facilitate communication.
The satellite sends weather data back to Earth.
Engineers launched a new communications satellite into orbit to improve internet speeds in remote mountain villages.
While the moon remains Earth's only natural satellite, thousands of artificial devices now populate the low Earth orbit, providing essential services from global positioning to climate monitoring.
From Middle French satellite, from Latin satelles (“attendant”). Ultimately perhaps of Etruscan origin.
Often used as a noun adjunct to modify other nouns, such as in 'satellite imagery' or 'satellite television'.