Voyager 1

• The Voyager 1 probe recently picked up humming sound. The scientists have named this as “Plasma Wave Emission”. This humming sound has been interpreted as interstellar gas activity. Moving forward, the Voyager 1 will help scientists to understand the interactions between solar winds and the interstellar medium. The hum was of narrow frequency bandwidth.

About the discovery

• The discovery of humming sound was made by the Plasma Wave System Instrument of Voyager 1. This sound was heard after Voyager 1 exited the heliosphere and entered the interstellar space.
• The first humming sound was heard after three months the Voyager 1 exited heliosphere. The second sound was heard after six months the Voyager 1 exited the heliosphere. However, the second sound was louder. With this, the scientists conclude that the interstellar medium is getting thicker at faster rate.

Voyager 1

• The Voyager 1 was the first spacecraft to enter the heliosphere of the sun in 2012.
• The Voyager 1 was launched in 1977.
• It was launched to study the outer solar system and planets such as Saturn and Jupiter on its way.
• Voyager 2 is called the twin of Voyager 1.
• After operating for 44 years, it is still communicating with the Deep Space Network of NASA. The Deep Space Network of NASA is a worldwide space communication network located in the US, Spain and Australia.