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As NASA's Voyager 1 Surveys Interstellar Space, Its Density Measurements Are Making Waves
By Miles Hatfield & Vanessa Thomas
Voyager spacecraft detects 'persistent hum' beyond our solar system
By Amy Woodyatt
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Persistent plasma waves in interstellar space detected by Voyager 1
By Stella K. Ocker, Donald Gurnett & William S. Kurth
The Voyager 1 probe is now so far away that it can hear the background "hum" of interstellar space
By Nicole Karlis