Space

3 Messages We’ve Sent to Extraterrestrials

In the 1970s, astronomers Carl Sagan and Frank Drake developed the first messages intentionally sent out of our solar system. But how do you describe yourself to beings who have no concept of life on Earth?
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Sources:
http://voyager.jpl.nasa.gov/spacecraft/sceneearth.html
http://www.bbc.com/future/story/20141112-will-et-understand-our-messages
http://web.archive.org/web/20080802005337/http://www.news.cornell.edu/releases/Nov99/Arecibo.message.ws.html
http://web.archive.org/web/20080802005337/http://www.news.cornell.edu/releases/Nov99/Arecibo.message.ws.html#footnote
http://voyager.jpl.nasa.gov/spacecraft/goldenrec.html
http://www.space.com/6370-attempts-contact-aliens-date-150-years.html
http://www.johnstonsarchive.net/astro/pulsarmap.html
http://voyager.jpl.nasa.gov/spacecraft/goldenrec1.html

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