E.T. Talk pp 133-152 | Cite as

How Do We Know If There’s a Message?

  • Fernando J. Ballesteros
Part of the Astronomers' Universe book series (ASTRONOM)


As we have seen, radio waves can be excellent candidates for interplanetary communication, due to the fact that our galaxy is transparent to them. The problem lies in properly identifying the origin – artificial or natural – of an arriving signal. When we tune a radio receiver and we turn the antenna toward the cosmos, we gather hundreds of different signals. Even some of the natural signals are quite suggestive, and one can be tempted to consider them emissions from other civilizations.


Solar System Radio Telescope Human Language Binary Number Short Word 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  1. 1.Astronomical ObservatoryUniversity of ValenciaValenciaSpain

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