Voyager 1 detects plasma in interstellar space
buzz from interstellar space
Artist spacecraft depicted by the artist (Photo provided by: NASA Jet Laboratory)
NASA's Voyager probe has been launched for more than 40 years, but Voyager 1, which is 14 billion miles away, still brings us new discoveries. The detector recorded the "buzzing" sound from plasma in interstellar space, and scientists compared this faint sound to a drizzle.
detection plasma is one of the tasks of Voyager 1. It photographed lightning in Jupiter's atmosphere, recording in detail how the solar wind gradually drifted in outer space. In 2012, Voyager 1 turned to explore distant spaces that humans had never explored. It had passed through the top of the heliosphere at that time, where the solar wind (the stream of charged particles that the sun continues to emit) was no longer strong enough to counteract the interstellar medium outside the system. Since then, Voyager 1 continues to stay away from the solar system and detects plasma in the outer space.
Photo Gallery: NASA's "Great Sailing" epic mission, the 40th picture is the interstellar space in which the Navigator spacecraft
is located, which is roughly quite quiet. Stella Koch Oak, a doctoral student at Cornell University, pointed out in her report: "The sound we recorded is very weak and monotonous, because of its narrow bandwidth. We think it is the buzzing sound of interstellar space itself." Voyager 1 also includes the shocking sounds of solar wind bursting every few years. James Cordes, the first author of the research report and astronomer at Cornell University, wrote in the article: "When the solar wind bursts, the sound is like lightning and thunder in a storm, and then it returns to the gentle breeze and drizzle."
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However, they heard a buzzing sound, and accordingly they could track the changes in the interstellar medium between the two outbreaks, which would be of great benefit to the knowledge of that little-known space area. Oak believes that there are far more low-level activities in interstellar medium than scientists predict.
Another Cornell University astronomer Schami Chatkey pointed out in the report, "In this way, measuring interstellar plasma density does not require irregular solar activities. Whether the sun breaks out or not, the Navigator probe will send detailed information back. It tells us: 'I am cruising in this area, the plasma density here is...; I went to another area, the plasma density here is... and so on.' We will continue to get this data from the Navigator located in the depths of the universe."
Voyager 1, known as NASA's Navigator twin spacecraft, will fly to the distant starry sky and never stop. But in the eyes of scientists on Earth, their time is limited. One day before 2030, the plutonium fuel carried by the spacecraft will be exhausted.
Before the last moment arrived, every data sent back by the spacecraft was precious to the scientific community. "Let us cherish this gift to science," said Oke.
Related knowledge
Voyager 1 is a space probe launched by NASA on September 5, 1977. As part of the Navigator's Program, it conducts exploration and research on outer space of the solar system and interstellar space outside the heliosphere top. It is known as the Navigator Twin Detector, along with Navigator 2, and was launched 16 days later than the latter. As of June 29, 2022, Voyager 1 has been in service for 44 years, 9 months and 24 days, and is still receiving daily mission instructions through the Deep Space Network and transmitting data to the Earth. Real-time location and speed data are provided by NASA and its Jet Laboratory. According to data on June 29, 2022, Voyager 1 is 156.25 astronomical units away from the earth, making it the farthest artificial aircraft.
Outer space, also known as outer space, cosmic space, abbreviated as space, outer space or space (English: outer space), refers to the void area outside the Earth's atmosphere and other celestial bodies.
is different from vacuum. Outer space contains very low density substances, mainly hydrogen in plasma. Among them are electromagnetic radiation, magnetic fields, etc. In theory, outer space may also contain dark matter and dark energy.
BY:Rahul Rao
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