Tag

Magnetosphere

All articles tagged with #magnetosphere

space1 month ago•10 min saved

Voyager 2’s Uranus flyby captured a rare, sun-driven compression of the magnetosphere

A late-1980s reanalysis shows Voyager 2 arrived at Uranus during an unusually strong solar-wind event that compressed the dayside magnetosphere, shrinking its volume by about 78% in a simplified model. The encounter, though revealing, reflects a rare state (about 4% of similar conditions) rather than Uranus’s normal magnetic environment, and confirms the planet’s tilted, off-center internal field. The study also links the intense radiation belts to compression and notes the possible but not definitive absence of plasma from moons. A future Uranus orbiter would be needed to map the magnetosphere’s time evolution beyond a single flyby.

via Space Daily|

#magnetosphere #reanalysis #solar-wind

science1 month ago•54 min saved

Magnetar Observations Reveal Light’s Hidden Birefringence in Vacuum

Astronomers using multiple instruments observed magnetar 1E 1547.0−5408 and found polarization patterns consistent with vacuum birefringence, a quantum-electrodynamics effect where light splits in polarization under extreme magnetic fields. The result, aligning with Heisenberg–Euler predictions, provides strong observational evidence that empty space can modify light’s speed and polarization in ultra-strong magnetic environments, one of the clearest demonstrations of quantum vacuum properties to date.

via Yahoo|

#magnetar-1e-154705408 #magnetosphere #polarization

space2 months ago•10 min saved

Voyager 2’s Uranus Flyby: A Rare 4% Moment That Shaped Planetary Science

A 2024 reanalysis argues Voyager 2’s 1986 Uranus flyby occurred during an exceptionally compressed solar wind—an event estimated to happen only about 4% of the time—reframing the encounter as a rare snapshot that may explain Uranus’s unusual magnetosphere and radiation belts, and underscoring the need for multi-year orbital observations rather than a single flyby.

via Space Daily|

#magnetosphere #solar-wind #space

space2 months ago•14 min saved

Ganymede: a moon the size of a planet with its own magnetic field

Ganymede, Jupiter’s largest moon, is about the same diameter as Mercury but far less massive, thanks to its rock-and-ice composition; it likely harbors more water than Earth’s surface, has a layered interior with an iron-rich core and a conductive ocean, and uniquely generates its own magnetic field, creating a small magnetosphere within Jupiter’s. The moon’s complex geology, thin atmosphere, and tidal interactions mean it is a world in its own right, not just a simple satellite, and the upcoming JUICE mission aims to orbit Ganymede in 2034 to study its ice shell, ocean, and dynamo.

via Space Daily|

#ganymede #jupiter #magnetosphere

space-exploration3 months ago•92 min saved

StormWall: A six-satellite plasma shield could blunt solar superstorms

Scientists propose StormWall, a constellation of six bus‑sized satellites in geostationary orbit that would release gas to form a plasma barrier at Earth’s magnetosphere, potentially reducing the impact of solar superstorms by more than 50% (up to 84% in simulations of a 2024 event). While the concept is touted as feasible with current tech, it would be costly (billions), require large rockets, and raise environmental and safety questions, with further studies needed before any deployment.

via Live Science|

#magnetosphere #satellites #solar-storms

space-and-spaceflight4 months ago•16 min saved

StormWall: A Space Shield to Dampen Solar Storms

Scientists propose ‘StormWall,’ a constellation of mass-loading spacecraft in geosynchronous orbit that would ionize materials to create magnetospheric plasma, aiming to suppress magnetic reconnection during solar storms and potentially halve their impact. While conceptually feasible, major challenges remain in cost, maintenance, and orbital optimization before any deployment could be considered.

via Gizmodo|

#geoengineering #geomagnetic-storms #magnetosphere

science4 months ago•42 min saved

Exoplanet Magnetospheres Detected: A Magnetic Window Into Distant Worlds

Scientists using ESO's Very Large Telescope and Gemini North measured wind speeds on seven hot, Jupiter-like exoplanets and found patterns best explained by global magnetic fields, marking the first robust evidence of magnetospheres around worlds beyond our solar system. The inferred magnetic strengths are roughly four times Saturn’s and about half Jupiter’s. This breakthrough opens a new window for exoplanet research, suggesting magnetically driven aurorae and paving the way for future ELT observations to characterize smaller, potentially habitable worlds.

via Good News Network|

#eso #exoplanets #magnetic-field

science4 months ago•41 min saved

Scientists propose space-based chemical shield to deflect severe solar storms

Researchers suggest releasing trace chemical clouds into Earth's magnetosphere to form a protective shield against powerful solar storms. The idea is highly speculative and would require major advances in feasibility, funding, and risk assessment, as well as careful consideration of potential environmental and geopolitical consequences before any real-world testing.

via Yahoo|

#environmental-impacts #geoengineering #magnetosphere

space4 months ago•70 min saved

StormWall: a six-satellite plasma shield could blunt big solar storms

A Boston University team led by Brian Walsh proposes StormWall, a six-satellite fleet in geosynchronous orbit that would release mass-loading materials (e.g., barium, lithium, sodium, calcium) which ionize into a plasma cloud at the sun-facing edge of Earth’s magnetosphere. The artificial plasma would thicken the magnetopause, disrupting magnetic reconnection and potentially reducing a major geomagnetic storm’s intensity by more than 50%. The idea targets protecting satellites, communications, GPS, and electrical grids. It would be a one-and-done deployment (no replenishment) and would be costly, but private space activity could tip the economics in its favor. The concept was tested via simulations of the May 2024 “Mother’s Day” storm and details were published in Space Weather (June 2).

via Space|

#magnetosphere #solar-storm #space

space4 months ago•7 min saved

JWST Reveals Saturn’s Apparent Spin Is a Wind-Driven Auroral Cycle

Using JWST, researchers mapped Saturn’s aurora-driven upper-atmosphere heating and found that winds generate electrical currents which power the aurora, creating a self-sustaining cycle that makes Saturn’s rotation appear to vary when measured by auroral signals rather than by actual spin; the results solve decades of confusion about a possible spin change and reveal a planetary heat-pump like link between Saturn’s atmosphere and magnetosphere, with implications for other worlds.

via ScienceDaily|

#atmospheric-winds #aurora #james-webb-space-telescope

space4 months ago•72 min saved

Mars shows Earthlike solar-wind bending in its atmosphere

NASA’s MAVEN data, gathered after it went quiet in 2025, reveal the Zwan-Wolf effect—an Earth-style solar-wind deflection—occurring in Mars’ upper atmosphere during a December 2023 solar storm. The finding suggests Mars’ atmosphere can host temporary magnetic structures that funnel charged particles, implying the effect may operate continuously there but is usually too weak to detect; the results were published in Nature Communications. NASA also notes MAVEN’s ongoing recovery efforts after a period of contact loss.

via Space|

#magnetosphere #mars-atmosphere #maven

space4 months ago•11 min saved

Smile mission goes aloft to map Earth’s magnetosphere in X-rays

A European-Chinese satellite named Smile launched on a Vega-C rocket to image Earth’s magnetosphere in X‑rays for the first time, offering an outside view of how the solar wind interacts with the magnetic shield. The mission, a rare ESA–Chinese Academy of Sciences partnership, aims to test global magnetosphere models and improve space-weather forecasts, with first images due about three months after launch and a planned three‑year mission.

via Space Daily|

#esa-china-collaboration #magnetosphere #smile-mission

science4 months ago•10 min saved

Europe–China’s SMILE mission launches to image Earth’s magnetic shield against the solar wind

SMILE, a joint European-Chinese mission, launched from Kourou to image Earth’s magnetopause with soft X‑ray optics, enabling a three-year study of how the magnetosphere responds to solar wind and space weather while highlighting ongoing EU‑China scientific cooperation.

via Space Daily|

#magnetopause #magnetosphere #science

space4 months ago•5 min saved

ESA-China SMILE Mission to X-ray Earth’s Magnetosphere During Solar Storms

A joint ESA-Chinese mission named SMILE will launch to study how solar storms interact with Earth's magnetosphere by capturing X-ray emissions—the first such observations—from a highly elliptical orbit that will reach up to 121,000 km above Earth. Equipped with an X-ray imager, UV imager, ion analyzer and magnetometer, SMILE aims to improve space-weather understanding for satellites, astronauts and power grids over an initial three-year mission.

via The Daily Galaxy|

#esa-china-collaboration #magnetosphere #smile

science4 months ago•10 min saved

Saturn’s ‘sound’ is data transformation, not a microphone recording

NASA’s Cassini and other missions record electromagnetic vibrations in Saturn’s magnetosphere and translate them into audio, but there is no actual sound in space. The eerie “sound of Saturn” arises from frequency shifting and time compression during data sonification, a methodological tool used to study data and make patterns audible.

via Space Daily|

#cassini #magnetosphere #nasa