It was confirmed recently that Voyager 1 left the solar system back in August 25, 201, clocking a total travel distance of over 12 billion miles. Humans, by proxy, have officially begun interstellar travel.
According to the American Geophysical Union, on Aug. 25, Voyager I broke through the heliosphere, a region of space that surrounds our solar system like a bubble of anomalous cosmic rays. Its instruments then became bombarded with galactic cosmic rays, or radiation coming from outside our solar system.
Then Voyager I’s plasma wave instrument began to detect something new. Between October 2012 and May 2013 it recorded two instances of interstellar plasma vibrations. The sounds are frequencies within human hearing, so just consider this a preview of the things our great-grandchildren will hear on holiday to Alpha Centauri.
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