NASA's Voyager-1 sends back data of the 'hum' of interstellar gas
NASA's Voyager-1 sends back data of the 'hum' of interstellar gas Ryan Morrison For Mailonline © Provided by Daily Mail MailOnline logo NASA's Voyager-1 spacecraft, travelling outside the solar system, has sent back new data revealing a 'hum' given off by interstellar gas 14 billion miles from the Earth. The spacecraft, currently further away from the Earth than any human-made object before it, launched 44 years ago to study the gas giants of the outer solar system. Its instruments have now recorded the 'constant drone' of plasma - the fourth state of matter that makes up...