Messages and music beamed to alien super-Earth

Beaming signals to GJ273 b

The target of the “Sonar Calling” binary-coded radio transmission is a planet known as GJ273 b. (METI International Illustration / Danielle Futselaar)

Scientists and artists have banded together to beam coded radio transmissions toward a star that has a potentially habitable planet, just 12.4 light-years from Earth.

“Sónar Calling GJ273b” is the latest effort to communicate with aliens, 43 years since the first attempt was made using the 1,000-foot Arecibo radio telescope in Puerto Rico.

The “Sónar Calling” messages were sent on three successive days, Oct. 16-18, from the 32-meter EISCAT radio antenna in Tromsø, Norway, just inside the Arctic Circle. Each transmission was directed at peak power of 2 megawatts toward a red dwarf star known as GJ273, or Luyten’s Star, in the constellation Canis Major.

Astronomers say Luyten’s Star harbors a planet that’s more than twice as massive as Earth, in an orbit where water could conceivably exist in liquid form. “Sónar Calling” aims to communicate with any radio-savvy life forms on that planet, called GJ273 b.

Get the full story on GeekWire.

About Alan Boyle

Aerospace and science editor for GeekWire, creator of Cosmic Log, author of "The Case for Pluto: How a Little Planet Made a Big Difference," president of the Council for the Advancement of Science Writing. Check out "About Alan Boyle" for more fun facts.
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