After decades of fruitless scanning the skies for alien messages, scientists say it’s time to try a basic rule of etiquette: Say “hello” first.

A new San Francisco-based organization called METI, or Messaging Extra Terrestrial Intelligence, plans to send signals to distant planets, rather than waiting for them to call Earth.

By the end of 2018, the project aims to send some conversation-starters via radio or laser signals to a rocky planet circling Proxima Centauri, the nearest star other than the sun, and then to more distant destinations, hundreds or thousands of light years away.

It would be the first effort to send powerful, repeated and intentional messages into space, targeting the same stars over months or years.

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