It is true that it is far, very far. He has been traveling in space for more than 44 years. However, NASA’s Voyager 1 instruments continue to send data back to Earth. And it brings us a novelty that was commented on in Nature Astronomy magazine. The Voyager probe detected a hum in space.
The drone: interstellar gas
The spaceship quickly passed the edge of the solar system through the heliopause a long time ago. It is the boundary of our cosmic neighborhood with interstellar space. From there he entered the void. Although in reality it wouldn’t be as empty as we think.
The data traveled 21 billion kilometers away. Stella Koch Ocker is a PhD student in astronomy at Cornell University. She discovered the strange noise: “It’s very weak and monotonous. It’s on a narrow frequency bandwidth, “Ocker said in a statement. But we’ve discovered the persistent, faint hum of interstellar gas. ‘
It will help us understand the interstellar medium. And how it interacts with the solar wind and the protective bubble of the heliosphere is shaped and modified by its environment. Our star and our forces outside our solar system affect its shape.
Learning from noise
Voyager 1, launched in September 1977, flew over Jupiter in 1979. It moved at more than 50,000 kilometers per hour. It crossed the heliopause in August 2012. Then the spacecraft’s plasma wave system discovered glitches in the gas. But what is now is a constant and lingering signature created by the delicate, almost empty void.
“The interstellar medium is like calm rain,” says James Cordes. He is Professor of Astronomy at Cornell University and the lead author of the study. “In the case of a solar flare, it’s like seeing lightning in a thunderstorm. But then a ‘gentle rain’ returns »..
Cornell Shami Chatterjee is another author on the study. Investigate the importance of continuously monitoring the density of interstellar space. “We have never had the opportunity to evaluate this. After the Voyager probe detects a buzz in space, we can refine our search. We don’t need a random event related to the sun to measure interstellar plasma. Voyager continues to send information. It tells us, “Here is the density I’m navigating right now”. Here it is now. And so it becomes continuous.