In the context of spaceflight, satellites are objects which have been placed into orbit by human endeavor. They are sometimes called artificial satellites to distinguish them from natural satellites such as the Moon. Depending on the application, they use different types of satellite orbits.
- 1 History
- 2 Applications
- 3 Engineering challenges
Multipurpose and manned
The most common means of providing electric power to satellites is a combination of photovoltaic cells and batteries.