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#Magnetosphere

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MPI für Radioastronomie

The planets can be observed not only in visible light but also in the radio range! The first attempts at radio observations of planets began in 1954 when intense radio bursts from Jupiter were detected. This radiation did not come directly from the planet but from processes in its magnetosphere.

#FunFact: Jupiter's magnetic field is massive, even relative to the size of the planet itself – it extends over 650 million kilometers (to the orbit of Saturn!) and is 4000 times stronger than Earth's magnetic field. 🚀🌍 A pulsar's magnetic field, however, can be up to 100 trillion times stronger than Jupiter's!

Radio waves penetrate deep into planet atmospheres or the surface, providing us with information that cannot be obtained through other methods. For example, phase fluctuations in the radio emissions were detected on the Moon and Mercury. On Mars, high electrical conductivity in the soil due to iron oxides was detected.

#funfact Radio astronomy amateurs assure that Jupiter can also be "received" and "heard" at home. All you need is a radio receiver for radio waves in the 18 to 22 MHz range and an antenna specifically designed for this frequency range. 📡

📷 Radiation belts of the planets, NASA, JPL, NASA/AP | Collage: A. Kazantsev.

Radiation belts of the planets, NASA, JPL, NASA/AP | Collage: A. Kazantsev.
#radioastronomy#planetaryresearch#jupiter
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janggolan

Chirping [chorus] waves detected in baffling location near Earth —Scientists are stumped…
livescience.com/space/potentia
To better study the waves and what could be producing them, researchers have suggested better monitoring of incoming #plasma belches from the sun and how they interact with Earth's #magnetosphere. This could lead to answers that may prove vital for ensuring that future satellites, astronauts and deep #space missions to #Mars and beyond aren't fatally struck by high-speed electrons.

Live Science · Potentially deadly 'chirping waves' detected in baffling location near Earth, and scientists are stumpedBy Ben Turner
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IRAP

[Focus on #Jupiter's magnetodisk ...] Located in the gas giant's #magnetosphere, it consists of electric fields and #plasma originating from the moon Io, the Jovian ionosphere and the solar wind.

Thanks to data from the #Juno mission, a team of researchers has succeeded in providing a comprehensive and modern description of the #physics of Jupiter's magnetodisk, both in terms of structure and dynamics: irap.omp.eu/en/2025/01/a-compr

“The plasma distributions thus deduced will serve as a reference for future missions such as #Juice and Europa #Clipper, currently en route to Jupiter.”

Schematic of the Jovian magnetodisk and its connection to other components of the Jupiter system. The black curves illustrate the magnetic field lines. The blue dashed arrows indicate the three primary mass sources of the magnetodisk: the Io torus (and possibly other moons), Jovian ionosphere, and the solar wind. The blue solid arrow indicates the outward transport of cold plasma (Inward injection of hot plasma is not shown here for figure clarity). The orange dashed curves illustrate the large-scale electric currents connecting the magnetodisk and the ionosphere, as predicted by the corotation enforcement model. The inset illustrates how this current system is coupled and interacts with the atmosphere.
#astrophysics
Public
IRAP

[Focus sur le magnétodisque de #Jupiter ...] Situé dans la #magnétosphère de la géante gazeuse, il se compose de champs électriques et de #plasma issu de la lune Io, de l'ionosphère jovienne et du vent solaire.

Grâce aux données de la mission #Juno, une équipe de chercheurs est parvenue à fournir une description complète et moderne de la #physique du magnétodisque de Jupiter, à la fois en termes de structure et de dynamique : irap.omp.eu/2025/01/une-descri

"Les distributions de plasma ainsi déduites serviront de référence pour les futures missions telles #Juice et Europa #Clipper, actuellement en route vers Jupiter."

Schéma du magnétodisque jovien et de sa connexion avec les autres composants du système de Jupiter. Les courbes noires illustrent les lignes de champ magnétique. Les flèches bleues en pointillés indiquent les trois principales sources de masse du magnétodisque : le tore de Io (et peut-être d’autres lunes), l’ionosphère jovienne et le vent solaire. La flèche bleue pleine indique le transport de plasma froid vers l’extérieur (l’injection de plasma chaud vers l’intérieur n’est pas montrée ici pour la clarté de la figure). Les courbes en pointillés orange illustrent les courants électriques à grande échelle reliant le magnétodisque et l’ionosphère, comme prévu par le modèle d’application de la corotation. L’encadré montre comment ce système de courants est couplé et interagit avec l’atmosphère.
#astrophysics
Public
Benjamin Carr, Ph.D. 👨🏻‍💻🧬

#Uranus Might Have Experienced a Freak Event When #Voyager2 Visited
Much understanding of the planet comes from a brief flyby nearly 40yr ago, which researchers now say overlapped with an exceptional solar event.
Peculiarly, as Voyager 2 soared above, it found Uranus was quite different from other worlds in outer solar system. Is protective magnetic field, known as a #magnetosphere, was devoid of plasma, something prevalent around other #planets.
nytimes.com/2024/11/11/science
archive.ph/RoWMC

The New York Times · Uranus Might Have Experienced a Freak Event When Voyager 2 VisitedBy Jonathan O’Callaghan
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Spaceflight 🚀

The #X9 solar ☀️ flare emitted is the largest categorised by #NASA. A second #CME is likely to hit Earth on Saturday and Sunday. #SolarFlares do not cause the Northern Lights. They are caused by a phenomenon called coronal mass ejections that erupt from an active sun spot. Combined with flares, they can create #SolarStorms that interact with Earth's magnetic field 🌐 or #magnetosphere. bbc.com/news/articles/cy437gnp

www.bbc.comNorthern lights possible as huge solar flare spottedThe largest solar flare since 2017 has been spotted erupting from the Sun’s surface.
Continued thread
Public
Spaceflight 🚀

Scientists at #Nagoya University 🇯🇵 are developing a low-cost 💴 system to measure and observe #SpaceWeather entirely from the ground using magneto-impedance sensors. Currents ⚡ generated by ionized particles flowing in the #magnetosphere tens of thousands of kilometers above Earth produce magnetic 🧲 field variations, the effect can be observed in the changes in the magnetic field on Earth 🌏 spectrum.ieee.org/space-weathe

IEEE Spectrum · Monitoring Space Weather From the GroundBy John Boyd
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Daniel Fischer

Breaking news from #Mercury presented at an ongoing #EPSC press conference: measurements by the Mercury #Plasma Particle Experiment (MPPE) on board of the Japanese Mercury Magnetospheric Orbiter (MMO) which is part of the #BepiColombo mission during last week's close fly-by (the closest ever by a spacecraft at a planet) with puzzling changes ...which the presenting Japanese scientist could not explain. Mercury's #magnetosphere has a lot to offer!

Colorful plot of the data, counts as color vs. energy and time - with a "drastic change" obvious.
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Raccoon 🏳️‍🌈 :unverified:

Sometimes I think about the idea of in like, a story, and it always strikes me that so many stories like that have Mars turning into an earth-like planet... And I don't know how realistic that is for a planet that doesn't have a .

What I would like to see more of is a Mars where the CO2 hasn't been replaced with O2, which would blow off into space, it's just heated above freezing and pressurized above boiling, making habitation safer.

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