Scientists Find 'Chorus Waves' in Unexpected Part of Space
2025-02-04
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1International researchers recently released a study on bursts of energy in an unexpected area of space.
2Scientists call the energetic activity "chorus waves" because they are said to move at the same frequency as sounds humans can hear.
3When the energy is turned into audio signals, the waves sound like birds chirping.
4Researchers have known about chorus waves in space for many years.
5But the latest research has found the waves exist 100,000 kilometers from Earth.
6Chorus waves have never before been measured at such a big distance from a planet.
7In an email, study writer Chengming Liu from Beihang University in Beijing wrote: "They are one of the strongest and most significant waves in space."
8Allison Jaynes is a space physicist at the University of Iowa who was not involved with the study.
9Speaking about the recent study, Jaynes said, "That opens up a lot of new questions about the physics that could be possible in this area."
10The newfound chorus waves were detected in an area where Earth's magnetic field is stretched out.
11Scientists said they did not expect to find the waves there.
12The discovery raises new questions about how the chirping waves form.
13Jaynes added, "We definitely need to find more of these events."
14Scientists still are not sure how the waves develop.
15But they think Earth's magnetic field may have something to do with it.
16For many years, radio antennas have picked up chorus waves.
17This includes receivers at an Antarctica research station in the 1960s.
18And NASA's two Van Allen Probes heard the chirping sounds from Earth's radiation belts at a closer distance than the newest observations.
19The latest chorus waves were picked up by NASA's Magnetospheric Multiscale satellites.
20They were launched in 2015 to explore the Earth and the sun's magnetic fields.
21Chorus waves have also been found near other planets including Jupiter and Saturn.
22The waves can produce high-energy electrons.
23That means they can threaten satellite communications.
24The researchers said their findings suggest that chorus waves might be found everywhere in the magnetic fields of planets.
25The study was released on January 22 in the scientific publication Nature.
26I'm Anna Matteo.
1International researchers recently released a study on bursts of energy in an unexpected area of space. 2Scientists call the energetic activity "chorus waves" because they are said to move at the same frequency as sounds humans can hear. When the energy is turned into audio signals, the waves sound like birds chirping. 3Researchers have known about chorus waves in space for many years. But the latest research has found the waves exist 100,000 kilometers from Earth. Chorus waves have never before been measured at such a big distance from a planet. 4In an email, study writer Chengming Liu from Beihang University in Beijing wrote: "They are one of the strongest and most significant waves in space." 5Allison Jaynes is a space physicist at the University of Iowa who was not involved with the study. Speaking about the recent study, Jaynes said, "That opens up a lot of new questions about the physics that could be possible in this area." 6The newfound chorus waves were detected in an area where Earth's magnetic field is stretched out. Scientists said they did not expect to find the waves there. The discovery raises new questions about how the chirping waves form. 7Jaynes added, "We definitely need to find more of these events." 8Scientists still are not sure how the waves develop. But they think Earth's magnetic field may have something to do with it. 9For many years, radio antennas have picked up chorus waves. This includes receivers at an Antarctica research station in the 1960s. And NASA's two Van Allen Probes heard the chirping sounds from Earth's radiation belts at a closer distance than the newest observations. 10The latest chorus waves were picked up by NASA's Magnetospheric Multiscale satellites. They were launched in 2015 to explore the Earth and the sun's magnetic fields. 11Chorus waves have also been found near other planets including Jupiter and Saturn. The waves can produce high-energy electrons. That means they can threaten satellite communications. 12The researchers said their findings suggest that chorus waves might be found everywhere in the magnetic fields of planets. 13The study was released on January 22 in the scientific publication Nature. 14I'm Anna Matteo. 15Adithi Ramakrishnan reported this story for the Associated Press from New York. Anna Matteo adapted it for VOA Learning English. 16______________________________________________________ 17Words in This Story 18chorus -n. a group of singers who sing together 19significant -adj. important, meaningful 20chirping -n. short, sharp sounds similar to the songs of certain birds 21frequency -n. the number of times a wave form repeats in a certain amount of time 22magnetic field -n. the area around a magnetized object that is influenced by its magnetism 23antenna -n. a device that carries radio waves to a receiver 24radiation belt -n. an area of charged particles around a planet that is formed largely because of its magnetic field