Articles tagged with Magnetosphere
Researchers have found an extremely hot magnetosphere around a white dwarf, a remnant of a star like our Sun. This discovery sheds light on the origin of highly ionised metals in some white dwarfs, which were previously a puzzle. The study reveals that the magnetic field traps material flowing from the surface, heating it up dramatically.
Researchers at Kanazawa University used satellite data to study the Earth's inner magnetosphere, gaining a better understanding of charged particles and electric fields. This knowledge can help protect satellites from damage caused by particle bursts, enabling more accurate space weather forecasts.
Scientists analyzed newly resurrected data from Galileo's first flyby of Ganymede, revealing a stormy scene with particles blasted off the moon's icy surface due to incoming plasma rain. The results may hold key insights into why Ganymede's auroras are so bright.
New research using NASA's THEMIS and Japan's ERG satellite data reveals chirping waves cause pulsating auroras by disturbing electrons in Earth's upper atmosphere. The discovery provides a definitive explanation for the mysterious phenomenon, with implications for understanding plasma waves across the universe.
The IMAGE mission used novel techniques like energetic neutral atom imaging to render the invisible visible, capturing large-scale images of the surrounding plasma and revealing new discoveries about Earth's magnetosphere and plasmasphere. This groundbreaking research continues to guide science today.
Researchers used MMS data to identify regions where high-energy electrons are accelerated, a key step in understanding magnetosphere energy conversion. This discovery will help scientists study magnetic reconnection and its effects on Earth's power grids and GPS communications.
Researchers used NASA's Magnetospheric Multiscale mission data and computer simulations to investigate the small-scale physics of plasma tornadoes at Earth's magnetosphere borders. They found that these tornadoes are extremely efficient at transporting charged particles into the magnetosphere.
NASA has launched a fleet of missions to study the planets in our solar system, revealing unique features of each planet's magnetosphere. Earth's and other magnetospheres deflect charged particles away from the planet, but also trap energetic particles in radiation belts.
NASA's Magnetospheric Multiscale mission (MMS) is breaking records with a Guinness World Record for the highest altitude fix of a GPS signal, reaching 43,500 miles above Earth. The four MMS spacecraft maintain tight formations to map magnetic reconnection and study phenomena around the universe.
The Van Allen Probes detected a sudden pulse of high-energy electrons energized by an interplanetary shock, and five days later, an increased number of even higher energy electrons. Researchers can now better understand the unique energization processes following a geomagnetic storm.
Scientists have discovered a 'space tsunami' that creates the third Van Allen Belt, a region of intense radiation in space. This finding helps mitigate the effects of extreme space weather and has significant implications for satellite operations and human exploration.
Two NASA sounding-rocket missions aim to investigate coronal nanoflares and oxygen atom escape into Earth's magnetosphere. FOXSI-3 will study hard X-ray imager/spectrometer signatures of tiny energy releases, while VISIONS-2 will observe outflowing ions from Earth's upper atmosphere.
The Magnetospheric Multiscale (MMS) mission is providing unprecedented insights into magnetic reconnection, a process that drives giant magnetic bursts and oscillations in Earth's magnetic fields. Scientists are using MMS' high-resolution measurements to better understand the role of magnetic reconnection in shaping the space environme...
Researchers used satellite and ground-based measurements to study pulsating auroras, finding that low-energy secondary electrons play a crucial role in their structure and shape. The discovery suggests that these electrons may be more important than previously thought in creating the glowing lights of auroras.
Researchers found an O-type star, NGC 1624-2, has the largest known magnetosphere, trapping gas and creating a massive aura of hot, dense plasma. The star's powerful stellar winds are up to 100,000 times denser than our Sun's solar wind.
The NASA-led group has developed a wide-field-of-view imager capable of detecting soft X-ray emissions produced when the solar wind encounters neutral gas, including Earth, Mars, and comets. The imager uses Lobster-Eye optics to focus soft X-rays onto a plane located at half the radius of the sphere.
Scientists have discovered Kelvin-Helmholtz waves at the boundaries of near-Earth space, which are now found to be much more prevalent than previously thought. These waves are triggered by plumes of charged gas from Earth's plasmasphere and interact with the solar wind and magnetosphere.
Kelvin-Helmholtz waves frequently occur at Earth's magnetopause, changing radiation belt energy levels and impacting spacecraft technology. Researchers used THEMIS data to find that these waves happen 20% of the time, providing new insights into the magnetosphere's basic physics.
The MMS mission aims to investigate how the Sun's magnetic field merges with the Earth's magnetic field, explosively converting magnetic energy into heat and kinetic energy. The four identical spacecraft will use the Earth's magnetosphere as a laboratory to study this universal force of nature.
Scientists at MIT and NASA have identified a process in the Earth's magnetosphere that reinforces its shielding effect, keeping incoming solar energy at bay. A plume of low-energy plasma particles slows magnetic reconnection, blunting the sun's effects on Earth.
A new study reveals that a pool of dense particles in the magnetosphere can extend out to meet and block incoming solar material, adding an extra layer of protection for spacecraft. This process helps curb magnetic reconnection, allowing energy and solar material to cross the boundary into the magnetosphere.
Giant hot flow anomalies can swallow Venus whole due to its magnetic field absence, posing a significant threat to the planet's surface. Observations from European Space Agency's Venus Express reveal frequent and large-scale space weather events at Venus.
A new study provides conclusive proof of a space wind first proposed 20 years ago, detected by the Cluster spacecraft in the Earth's magnetosphere. The wind releases almost 90 tonnes of plasma into space every day.
A University of Iowa undergraduate student has discovered that Saturn's magnetosphere changes with the seasons, helping to clarify the planet's day length. The findings may alter our understanding of the Earth's magnetosphere and Van Allen radiation belts.
The NASA Wind spacecraft has detected 'SLAMS' waves in the region between the Earth's magnetosphere and the sun, showing that these structures may accelerate narrow jets of charged particles. The discovery provides new insights into how radiation and energy from the sun can cross the magnetosphere and impact near-Earth space.
The IBEX and TWINS missions observed a solar storm on April 5, 2010, revealing the impact on Earth's magnetosphere. The data provides insights into how solar energy affects the magnetosphere, enabling better protection for satellites against space weather hazards.
The TWINS and IBEX spacecraft observed a powerful solar storm impacting the Earth's magnetosphere, causing an important communications satellite to founder. The ENA cameras enabled global imaging of the magnetosphere, revealing precise timing of the compression and propagation of charged particles into the atmosphere.
The THEMIS mission has significantly advanced our understanding of the magnetosphere, mapping the topology and structure of the Earth's magnetic field. The satellites have also detected critical mechanisms driving substorms, including dipolarization fronts and chorus waves, which influence aurora formation.
Research papers published in AGU journals explore the impact of a Saturn moon on its magnetosphere, as well as a new way to measure Earth's magnetosphere. Scientists also discover that Loch Ness in Scotland is affected by ocean tidal loading, which controls the loch's tide.
The Juno Mission aims to study the origin and evolution of Jupiter, helping scientists understand planetary formation and the solar system. The spacecraft will orbit Jupiter's poles 33 times, measuring magnetic activity and water content in its atmosphere.
The IBEX spacecraft has taken unprecedented photos of the plasma sheet, a complex region surrounding Earth's magnetic field. The images show a plasmoid being ejected into space, providing direct visual evidence of space weather events that can cause auroras and radiation failures.
The NASA Interstellar Boundary Explorer (IBEX) spacecraft has made the first-ever images of the plasma sheet and magnetotail in the Earth's magnetosphere. The data suggests a piece of the plasma sheet was bitten off and ejected down the tail, revealing dynamic interactions that have never been seen before.
Researchers have discovered that many pulsar characteristics are linked due to an underlying cause. The study used observations of 366 pulsars collected over several decades and found that the magnetosphere switches back and forth between two different states.
Climate researchers have found that the Indian Ocean Dipole is occurring more frequently due to global warming, leading to extreme weather patterns. Meanwhile, a study in North America reveals that natural cooling factors contributed to an unusually cold year in 2008, contradicting claims of a prolonged cooling trend.
Researchers at UCLA have found a surprise energy transfer mechanism from the solar wind to the Earth's magnetosphere, which could improve spacecraft safety and reliability. This discovery contradicts long-held assumptions about the control of energy transfer rate.
A team of scientists has discovered a new region of the magnetosphere known as the warm plasma cloak, which affects Earth's space environment. This invisible shield is fed by low-energy charged particles and can impact our daily lives, causing power surges, disrupting radio transmissions, and damaging satellites.
Papers in this special issue cover data analysis and investigations of the Double Star Program, as well as CMEs, Solar wind, and magnetosphere topics. The conference brought together prominent researchers, including Z.X.LIU and S.T. WU, to share their latest findings on solar and magnetospheric physics.
Researchers found energetic electrons most abundantly at sites of compressed density within magnetic islands, contradicting previous theories. This discovery provides an important step towards solving the mystery of electron acceleration during magnetic reconnection.
Scientists have gained new insights into killer electrons, which can damage satellites and pose a hazard to astronauts. The unique data collected during a geomagnetic storm revealed the mechanism behind their creation, with solar wind particles inducing undulations in Earth's magnetosphere.
Researchers made an unprecedented measurement of the electric field in magnetic reconnection using ESA's Cluster satellites. They discovered that the electric field plays a key role in the process, releasing energy and triggering jets of energetic particles.
Researchers have discovered that giant whirlpools of electrically charged gas above the Earth inject electrified gas into the planet's magnetic environment. The whirlpools, known as Kelvin-Helmholtz instabilities, cause magnetic reconnection events that redirect plasma along new routes.
The Cassini spacecraft detected 'holes' in Saturn's magnetosphere near Enceladus, indicating that the moon's geologically active plumes of water change over days or weeks. This variation affects Saturn's magnetosphere, causing material to be lost from Enceladus.
Astronomers have discovered a unique pulsar that is only 'on' for part of the time, shedding light on how pulsars emit regular beams of radio waves. The pulsar, PSR B1931+24, slows down 50% faster when it's active compared to when it's not.
The European Space Agency's Cluster satellites have observed small-scale vortex turbulence, previously predicted by mathematical models, in the plasma surrounding Earth. The discovery has significant implications for understanding solar activity and its effects on our planet.
Scientists discovered a consistent relationship between lightning strikes and ice content in clouds, supporting previous physics assumptions. In contrast, dense solar winds sometimes weaken auroral electrojets by compressing the magnetosphere.
The Cluster mission has found a new way for charged particles from the solar wind to enter Earth's magnetosphere, using giant vortices called non-linear Kelvin-Helmholtz waves. These vortices can carry particles inside the magnetosphere, potentially explaining the presence of hot plasma stored in the tail of Earth's magnetic field.
The THEMIS mission aims to pinpoint the location of substorms that produce auroral eruptions. Five satellites will track the motion of plasma along the sun-Earth line, providing insights into the processing of solar wind energy. The mission has the potential to resolve a long-standing problem in understanding space weather.
Researchers confirm long-standing mystery of magnetic reconnection, a process that generates solar flares and aurorae. The event was observed by NASA's Wind spacecraft as it flew through the Earth's magnetotail, revealing collisionless processes that explain its fast rate.
The Cassini spacecraft's Magnetospheric Imaging Instrument (MIMI) has captured the first images of Jupiter's magnetosphere and surrounding particles. These images reveal the presence of a huge nebula enveloping Jupiter, extending out to 13 million miles from the planet.
The IMAGE far-ultraviolet camera has captured breathtaking auroras visible from Georgia, Florida, and Texas, revealing minute details in their structure and shape. The camera's ability to image invisible ion auroras has greatly expanded scientists' understanding of the Earth's magnetosphere.
Scientists have found that 'raining' electrons from Earth's magnetosphere destroy ozone in the upper atmosphere, creating a new aspect of natural ozone destruction. The degree of electron precipitation is directly related to the 11-year solar cycle.
A new study found that a sharp decrease in solar wind density caused Earth's magnetosphere to balloon to more than 100 times its normal volume, reaching nearly to the moon. The event, dubbed "The Day the Solar Wind Ran Out of Gas," was rare and only seen a few times since satellites began measuring solar wind 35 years ago.
Scientists measure solar wind gusts that squeeze the Earth's magnetosphere, triggering brightening in the aurora borealis. This phenomenon can lead to global magnetic storms, potentially disrupting communications and power supplies.
Researchers have developed new methods to visualize the magnetosphere, a complex region surrounding Earth, by analyzing images of charged particles. The technique uses neutral atoms in space to create detailed maps of the magnetosphere's structure and behavior.
Scientists observed unusual transpolar auroral arcs during a geomagnetic storm in January 1997, contradicting existing models of the magnetosphere. The phenomenon was caused by energy propagating towards the dayside along the arc, indicating dynamic events in the magnetosphere.