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communication

(Encyclopedia)communication, transfer of information, such as thoughts and messages, as contrasted with transportation, the transfer of goods and persons (see information theory). The basic forms of communication a...

Epimetheus, in astronomy

(Encyclopedia)Epimetheus, in astronomy, one of the named moons, or natural satellites, of Saturn. Also known as Saturn XI (or S11), Epimetheus is an irregularly shaped (nonspherical) body measuring about 89 mi (144...

GPS

(Encyclopedia)GPS: see navigation satellite.

Syncom

(Encyclopedia)Syncom: see communications satellite. ...

Telstar

(Encyclopedia)Telstar: see communications satellite. ...

Global Positioning System

(Encyclopedia)Global Positioning System: see navigation satellite. ...

photogrammetry

(Encyclopedia)photogrammetry: see aerial and satellite photography. ...

Janus, in astronomy

(Encyclopedia)Janus jāˈnəs [key], in astronomy, one of the named moons, or natural satellites, of Saturn. Also known as Saturn X (or S10), Janus is an irregularly shaped (nonspherical) body measuring about 122 m...

International Geophysical Year

(Encyclopedia)International Geophysical Year (IGY), 18-month period from July, 1957, through Dec., 1958, during a period of maximum sunspot activity, designated for cooperative study of the solar-terrestrial enviro...

Charon, in astronomy

(Encyclopedia)Charon, in astronomy, the natural satellite, or moon, of Pluto. ...