Voyager 1 Has Detected a Mysterious Cosmic Hum In Deep Space

Voyager 1 spacecraft has detected a mysterious cosmic hum in interstellar space. Voyager 1 is the farthest spacecraft from Earth. The twin Voyager spacecraft were launched in 1977 to take advantage of a rare planetary alignment that occurs every 176 years. It made it possible for us to explore all the four gas giants of the solar system: Jupiter, Saturn, Uranus, and Neptune. In 2012, Voyager 1 became the first spacecraft to exit the heliosphere and enter interstellar space. Traveling at about 17 km/s, Voyager 1 is still sending back data. Since it is so far away, even radio transmissions take 21 hours to get there. The probe’s latest discovery has questioned our perception of the emptiness of the deep space out there. Voyager 1 has detected a steady hum of plasma waves in interstellar space at a low frequency of 3 kHz. Also called the fourth state of matter, plasma is the most abundant state in the universe. Stars are magnetized balls of plasma. It is a hot and ionized gas composed of elect