You could hear a pin drop. That鈥檚 how quiet the cosmos appears to be despite news that a year-old spike in radio signals could point toward an intelligent extraterrestrial civilisation.
The signal, detected on 15 May 2015 by a radio telescope operated by the听Russian Academy of Sciences, was so powerful it evoked a radio beacon built by an intelligent civilisation. It appeared to originate from the star HD 164595, in the constellation Hercules, which has one known planet roughly the size of Neptune.
SETI astronomers across the globe have jumped into action to try to confirm that signal. But so far, there鈥檚 no sign of ET.
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In an posted online this morning, at the Berkeley SETI Research Center reported how the Breakthrough Listen Initiative 鈥� a project that uses radio telescopes across the world to look听for signs of intelligent life beyond Earth 鈥� searched for the signal in听archived data. Unfortunately, no counterparts were spotted in the Naval Radio Astronomy Observatory Catalog 鈥� a null result, which is unexpected if the signal is real.
Lucky detection?
This suggests that the Russian team was 鈥渆ither extremely lucky to detect this source in their observations, or that the transient is due to local interference or other calibration issues鈥�, write Croft and his colleagues.
Just in case, the team aimed the in West Virginia toward the star on Sunday night. They didn鈥檛 detect any ongoing emission from the direction of the star, but they are careful to point out that this doesn鈥檛 mean there鈥檚 no extraterrestrial civilisation there.
of the SETI Institute and his colleagues also observed the star on听Sunday and Monday nights with the in northern California. The first night turned up empty and Shostak hasn鈥檛 yet received the results from the second night.
And , the president of METI International 鈥� a group that isn鈥檛 just looking for signs of intelligent extraterrestrial life, but would like to send messages to them as well 鈥� has听made plans to swing the in Panama toward the star. Unfortunately, a series of thunderstorms has hit the area and are forecast听to continue for several days.
鈥淥nce the skies clear, we will have about an hour shortly after sunset each night to search for signals,鈥� he says.
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