Strange double starlight pulses revealed in new SETI search

View larger. | Artist’s depiction of laser signals from a star reaching Earth. The search for such signals is called optical SETI or LaserSETI. A recent search has found 2 unusual, fast and identical starlight pulses coming from a star 100 light-years away. Their cause is unknown. Image via SETI Institute.

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• HD 89389 is a sunlike star about 100 light-years from Earth. It is slightly brighter and more massive than our sun.