Radio source SHGb02+14a

From Wikipedia, the free encyclopedia
Jump to: navigation, search
2 comparison graphs of the signal, from the SETI@Home website

Radio source SHGb02+14a is a source and a candidate in the Search for Extra-Terrestrial Intelligence (SETI), discovered in March 2003 by SETI@home and announced in New Scientist on September 1, 2004.[1]

The source was observed three times at a frequency of about 1420 MHz,[1][2] one of the frequencies in the waterhole region, which is theorized to be a good candidate for frequencies used by extraterrestrial intelligence to broadcast contact signals.

There are a number of puzzling features of this candidate, which have led to a large amount of skepticism.[3] The source is located between the constellations Pisces and Aries, a direction in which no stars are observed within 1000 light years of Earth. It is also a very weak signal. The frequency of the signal has a rapid drift, which would correspond to it being emitted from a planet rotating nearly 40 times faster around its own axis than the Earth. Each time the signal was detected, it was again at about 1420 MHz, the original frequency before any drift.

There are also a number of potential explanations for this signal. SETI@home has denied media reports of a likely extraterrestrial intelligence signal.[2][3] It could be an artifact of random chance, cosmic noise or even just a glitch in the technology.

See also[edit]

References and notes[edit]

  1. ^ a b Reich, Euginie (2004-09-01). "Mysterious signals from light years away". New Scientist. Retrieved 2006-06-12. 
  2. ^ a b Whitehouse, David (2004-09-02). "Astronomers deny ET signal report". BBC News. Retrieved 2006-06-12. 
  3. ^ a b Alexander, Amir (2004-09-02). "SETI@home Leaders Deny Reports of Likely Extraterrestrial Signal". The Planetary Society. Archived from the original on 2011-07-26. Retrieved 2006-06-12. 

External links[edit]