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Beam us up

作者:翁瞌    发布时间:2019-03-06 12:01:07    

There’s a fresh eye on the lookout for extraterrestrial intelligence. The University of California’s Lick Observatory has fitted a detector to one of its optical telescopes to scan the skies for laser pulses beamed our way by alien civilisations. Optical SETI searches have been attempted before but were prone to crying wolf. Cosmic rays or radioactive decays inside a detector can look like a signal, says Seth Shostak of the SETI Institute in Mountain View, California. The new detector uses three independent light sensors,

 

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