January 27, 2022

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Flight Juno reveals amazing new images of Jupiter, the sounds of its moon Ganymede

NASA’s Juno mission, which began orbiting Jupiter in July 2016, recently made its 38th close flyby of the gas giant. The mission was extended earlier this year with the addition of a flight around Jupiter’s moon Ganymede in June.

During a briefing at the American Geophysical Union meeting in New Orleans on Friday, Scott Bolton, Juno’s senior researcher at the Southwest Research Institute in San Antonio, said data and images from these flights could rediscover everything we know about Jupiter.

Bolton reveals the sound there for 50 seconds while Juno flew past Ganymede in the summer. The moon’s sound is generated by electrical and magnetic radio waves produced by the planet’s magnetic field and are picked up by a wave probe designed to detect these waves. Sounds like a 3D space age soundtrack.

“This soundtrack is so wild that you feel like you’re riding alongside Juno for the first time in over two decades,” Bolton said. “If you listen carefully, you may hear a sudden change in high frequencies around the center of the recording, which represents Ganymede’s entry into another region of the magnetosphere.”

Juno’s team continues to analyze data from Ganymede’s journey. At the time, Juno was 645 miles (1,038 km) above the moon’s surface and was moving at 41,600 mph (67,000 km/h).

“It is likely that the change in frequency soon after the closest approach is due to the nocturnal Ganymede crossing,” said William Court, a senior co-investigator at Waves at the University of Iowa in Iowa. city ​​in a statement.

The team also shared stunning new images reminiscent of artistic views of Jupiter’s swirling atmosphere.

This image, created by the Juno mission, shows two large circular storms of Jupiter captured on November 29.

“You can see how beautiful Jupiter is,” Bolton said. “It’s a really artistic painting. It’s almost like a Van Gogh painting. You see these wonderful swirls and swirling clouds in different colors.”

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This is visually stunning serving photos Help scientists better understand Jupiter and its many mysteries. Hurricane footage at Jupiter’s poles caught the attention of Leo Siegelman, a scientist working with the Juno team, who usually studies Earth’s oceans. Note the similarities between the dynamics of Jupiter’s atmosphere and the eddies in Earth’s oceans.

“When I saw the wealth of turbulence around Jovian cyclones with all the fibers and little eddies, it reminded me of the turbulence I see in the ocean,” said Siegelman, a physical oceanographer and a Scripps Institute postdoctoral fellow. . Oceanography at the University of California, San Diego in a statement.

This is particularly evident in high-resolution satellite images of eddies in Earth’s oceans, emerging from plankton blooms that act as flow indicators.

Oceanographers use their expertise in ocean ridges to study disturbances at Jupiter's poles and the physical forces driving large hurricanes.  Compare this image of phytoplankton blooms in the Norwegian Sea (left) with turbulent clouds in Jupiter's atmosphere (right).

Mapping the magnetic field of Jupiter

Juno’s data also helps scientists map Jupiter’s magnetic field, including the Great Blue Spot. This region is a magnetic anomaly located at Jupiter’s equator – not to be confused with the Great Red Spot, a centuries-old atmospheric storm south of the equator.

Since Juno’s arrival at Jupiter, the team has observed changes in Jupiter’s magnetic field. The large blue spot moves about 2 inches (5.1 cm) to the east. per second and a complete revolution around the planet in 350 years.

Meanwhile, the Great Red Spot is moving west and will cross this finish line very quickly in about 4.5 years.

NASA's Juno spacecraft has circled twice over Jupiter's Great Red Spot.  It turns out that

However, the large blue spot is torn by the currents of Jupiter, giving it a striped appearance. This visible pattern tells scientists that these winds reach deep into the gaseous planet’s interior.

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Maps of Jupiter’s magnetic field generated by Juno data also showed that the planet’s dynamo effect, which creates magnetic fields from within Jupiter, comes from metallic hydrogen under a layer of “helium rain.”

Juno was also able to see a very faint ring of dust around Jupiter from within the ring. This dust is actually made up of two smaller moons on the planet, Metis and Adrastia. The observations allowed the researchers to see part of the constellation Perseus from a different planetary perspective.

Mission Juno sees that

“It’s amazing to be able to see these famous constellations within half a billion miles of the spacecraft,” said Heidi Becker, senior research associate for the Juno Stellar Reference Module at NASA’s Jet Propulsion Laboratory in Pasadena, California. And

“But everything looks about the same when we appreciate them from our courts on the ground. It is a wonderful reminder of how small we are and how much more we need to explore.”

In the fall of 2022, Jupiter will fly past Jupiter’s moon Europa, which will visit its own mission. euro scissors, scheduled for launch in 2024. Europe worries scientists because the global ocean lies under the ice sheet. Ice suits are sometimes thrown into space. The Europa Clipper can “taste” this ocean, fly its wings – and see if life is possible in this ocean world.