Publication Date:
2006-01-11
Description:
Communications between civilizations within our galaxy at the present level of radio engineering is possible, although civilizations must begin to search for each other to achieve this. If an extra-terrestrial civilization possessing a technology at our level wishes to make itself known and will transmit special radio signals to do this, then it can be picked up by us at a distance of several hundreds of light years using already existing radio telescopes and specially built radio receivers. If it wishes, this civilization can also send us information without awaiting our answer.
Keywords:
COMMUNICATIONS
Type:
Inhabited Space, Pt. 2 (NASA-TT-F-820); p 79-82
Format:
text