If you're looking to communicate with distant aliens, laser power is your best friend. A new early-stage study proposes creating a beacon from Earth that could be seen as far as 20,000 light-years away — or about 5,000 times further than the nearest star system from Earth, Alpha Centauri. It's a new way to tell extraterrestrials we're here.
Related Video: The Search for Extraterrestrial Intelligence
Can We Build It?
Written by Elizabeth Howell November 7, 2018
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