“The Sound of the Universe!” Data from Voyager-1 Reveal Interstellar Gas “Hum”!

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NASA’s Voyager-1 spacecraft, which is traveling outside the solar system, has sent new data revealing a “hum” of interstellar gas 14 billion miles from Earth.

The spacecraft was launched 44 years ago to study gas giants in the outer solar system.

Its instruments have now recorded the “fixed drone” of plasma – the fourth state of matter that makes up 99.9% of the universe – while in interstellar space.

The faint, monotone sound was sent to Earth by the Voyager-1 in “narrow band”.

Astronomers at Cornell University, who analyzed the interstellar resonance, say the signal carrying the data was too weak to be heard without processing.

The discovery of the continuous tinnitus is expected to help astronomers understand more about how the medium interacts with the edges of the solar wind.

By examining slowly transmitted data from a distance of more than 14 billion miles, Stella Koch-Acker, a PhD student at Cornell University in Astronomy, revealed the resurgence.

“It’s very faint and monotonous, because it’s in a narrow bandwidth,” Oker said.

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Voyager-1 crossed into interstellar space in August 2012 – and data continues to be collected. No human-made object has traveled further than NASA’s famous spacecraft. She holds a copy of the Gold Record – “A Letter to Alien Beings” compiled by legendary astronomer Carl Sagan. There are greetings in 55 languages ​​and pictures of people and places on Earth.

The passage into interstellar space involves passing through the heliosphere – the theoretical boundary where the solar wind of the Sun meets the interstellar medium.

The study, published in Nature Astronomy, shows how the heliosphere is formed, says the New York team.

After entering interstellar space in 2012, the Voyager-1 plasma wave system detected gas explosions caused by our sun, with a steady, continuous signal from the nearly fragile void of space between the emissions.

“ The interstellar medium is like a calm or gentle rain, ” said lead author, Professor James Cordes, adding that when there is a solar outburst, it is like detecting a lightning burst in a thunderstorm, then returning to a gentle rain.

Okker believes there is more activity in the interstellar gas than scientists previously thought, allowing researchers to track the spatial distribution of the plasma – that is, when it is not affected by solar flares.

Co-author Shami Chatterjee said, “We never had the opportunity to evaluate it. We now know that we don’t need an accidental sun-related event to measure the interstellar plasma. No matter what the sun does, Voyager sends the details back.”

The emission of very narrow-band and extremely weak plasma waves that the team discovered appears to continue for about 10 AU (929 million miles) from interstellar space. The emission appears to differ from the plasma oscillations caused by the shock, that is, those produced by the strong solar winds, which were previously used to measure the local density of plasma outside the heliosphere.

The study authors speculate that “resonance” may be generated by oscillations of thermally excited or above-ground plasma – very energetic particles.

Continued emissions from the most recent published data from Voyager-1 indicate that it may still be detectable by Voyager-1.

The results are published in a journal Nature Astronomy.

Source: Daily Mail



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