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NASA probe furthest from Earth 'picking up mysterious hum from another galaxy'
NASA spacecraft has picked up a persistent “hum” beyond our solar system.Voyager 1, the furthest spacecraft from Earth which is currently 14billion miles away, has detected the sound of the universe.The vessel, which was launched 44 years ago, has instruments which have recorded the "constant drone" of plasma.This is the fourth state of matter which makes up 99.9% of the universe.The bizarre noises are like the special effects of a science fiction film and were identified in data arriving from outside our solar system.Astrophysicist Stella Ocker said: "It's very faint and monotone because it's in a narrow frequency bandwidth."We're detecting the faint, persistent hum of interstellar gas."No manmade object has travelled further than the
