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