Satellites and Sputnik

Satellite is any object that orbits or revolves around another object. For example, the Moon is a satellite of Earth, and Earth is a satellite of the Sun. The man-made satellites that orbit Earth and the Sun -- highly specialized tools that do thousands of tasks every day. Each of these satellites has many parts, but two parts common to all satellites are called the payload and the bus.
The payload is all the equipment a satellite needs to do its job. This can include antennas, cameras, radar, and electronics. The payload is different for every satellite. For example, the payload for a we…