Should we really tell aliens there is life on Earth?

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Despite there being an estimated 300 million habitable planets in the Milky Way galaxy alone, astronomers have found no evidence of life off Earth, much less intelligent life. Even with advancements in technology, studying faraway worlds is incredibly difficult. So instead of searching for alien civilizations, some astronomers have decided to simply make it easier for aliens to find us.

Chris Impey is an astronomer at the University of Arizona who also works in the field of METI – messaging extraterrestrial intelligence. It has been more than 40 years since humanity first sent a blast of radio waves out into space with the sole purpose of acting as a beacon for any aliens that may be out there. But in the coming months, two teams are going to send messages toward two particularly interesting parts of the galaxy.

In his article, Impey describes where these messages are headed, what they contain and why some great minds in the astronomy community – including the late Stephen Hawking – have expressed misgivings over the idea of grabbing the attention of any other life forms that might be out in the galaxy.

Also today:

One last note: On Monday, we’ll be hosting a free webinar with leaders from humanitarian groups and experts in philanthropy to discuss aid to Ukraine.

Daniel Merino

Assistant Science Editor & Co-Host of The Conversation Weekly Podcast

Scientists think there are 300 million habitable planets in the Milky Way, and some may be home to intelligent life. Bruno Gilli/ESO

Blasting Earth’s location out in the hope of reaching aliens is a controversial idea – two teams of scientists are doing it anyway

Chris Impey, University of Arizona

This year, two groups of astronomers plan to send messages containing information about humans and the location of Earth toward parts of space they think may be home to intelligent life.

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