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Book 4: Chapter 23 – Eyes in the Sky

 1. Navigational satellites are satellites which use radio time signals transmitted to enable mobile receivers on the ground to determine their   exact location.

2. Communications satellites are satellites stationed in space for the purpose of telecommunications. Telecommunication is communication at a distance by technological means, particularly through electrical signals.

3. Weather satellite is a type of satellite that is primarily used to monitor the weather and climate of the Earth. Vanguard 2 was the first weather satellite. It was launched on 17 February 1959.

4. A spy satellite is officially referred to as a reconnaissance satellite. It is an Earth observation satellite or communications satellite deployed for military or intelligence applications. Very little is known about the full power of these satellites, as governments who operate them usually keep information pertaining to their reconnaissance satellites classified.

5. Biosatellites are satellites designed to carry living organisms, generally for scientific experimentation. The first satellite with animal (dog) was Soviet Sputnik 2 at 3 November 1957. On 20 August 1960 Soviet Sputnik 5 first time recovered animals (dogs) from orbit to Earth.


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