https://www.cnet.com/news/mit-high-powered-lasers-could-send-bat-signal-to-alien-astronomers/ > "The kinds of lasers and telescopes that are being built today can produce a detectable signal, so that an astronomer could take one look at our star and immediately see something unusual about its spectrum," author James Clark, a graduate student in MIT's Department of Aeronautics and Astronautics, said in a statement this week. "I don't know if intelligent creatures around the sun would be their first guess, but it would certainly attract further attention."   > The research came out Monday in The Astrophysical Journal. It suggests that a 1- to 2-megawatt laser could be pointed through the mirrors of a massive telescope -- like the controversial Thirty Meter Telescope planned for Hawaii -- and shot into space to produce a planetary-scale lighthouse.