Apogee
The point farthest from the earth on the moon’s orbit. This term can be applied to any other body orbiting the earth, such as satellites. It is the opposite of perigee.
Satellite
Any object that orbits a celestial body, such as a moon. However, the term is often used in reference to the manufactured objects that orbit the earth, either in a geostationary or a polar manner. Some of the information that is gathered by weather satellites includes upper air temperatures and humidity, recording the temperatures of cloud tops, land, and ocean, monitoring the movement of clouds to determine upper level wind speeds, tracing the movement of water vapor, monitoring the sun and solar activity, and relaying data from weather instruments around the world.
Perigee
The point nearest the earth on the moon’s orbit. This term can be applied to any other body orbiting the earth, such as satellites. It is the opposite of apogee.