Latest Magnetosphere Stories

Swarm Shows Earth’s Changing Magnetism
2014-06-20 03:48:31

ESA The first set of high-resolution results from ESA’s three-satellite Swarm constellation reveals the most recent changes in the magnetic field that protects our planet. Launched in November 2013, Swarm is providing unprecedented insights into the complex workings of Earth’s magnetic field, which safeguards us from the bombarding cosmic radiation and charged particles. Measurements made over the past six months confirm the general trend of the field’s weakening, with the most...

Earth's Magnetosphere Doesn't Stop All Solar Wind From Breaking Through
2014-06-11 14:41:29

Brett Smith for redOrbit.com - Your Universe Online Using data from four European Space Agency satellites that fly in formation in the Earth's magnetic field, researchers have uncovered new information on how the solar wind can break through the Earth’s magnetosphere and disrupt modern life. According to a new report in the journal Physical Review Letters, when the solar wind meets the environment around the Earth – an electromagnetic phenomenon called an asymmetric magnetic...

dancing auroral lights on Saturn
2014-05-19 11:09:00

University of Leicester University of Leicester researchers have captured stunning images of Saturn's auroras as the planet's magnetic field is battered by charged particles from the Sun. The team's findings provide a "smoking gun" for the theory that Saturn's auroral displays are often caused by the dramatic collapse of its "magnetic tail". [ Watch the Video: Dance of Saturn’s Auroras ] Just like comets, planets such as Saturn and the Earth have a "tail" – known as the...

MMS To Study Secrets Of Magnetic Reconnection
2014-05-16 03:36:18

Susan Hendrix, NASA In March 2015, NASA will launch four identical spacecraft to study how magnetic fields around Earth connect and disconnect, explosively releasing energy – a process known as magnetic reconnection. The Magnetospheric Multiscale, or MMS, mission will provide the first three-dimensional views of this fundamental process that can accelerate particles to nearly the speed of light. MMS uses Earth’s protective magnetic space environment, the magnetosphere, as a natural...

Mars' Atmosphere Loss To Be Measured By NASA's MAVEN Orbiter
2014-05-15 10:47:48

Brett Smith for redOrbit.com - Your Universe Online When NASA’s Mars Atmosphere and Volatile Evolution (MAVEN) mission arrives at its destination later this year, an instrument on board could help to determine why Mars has slowly lost much of its atmosphere and become the barren planet we see today. After MAVEN enters into an orbit above Mars, its Solar Wind Ion Analyzer (SWIA) will begin sampling the small electrically charged particles in and above the planet’s wispy atmosphere....

Cluster Helps To Model The Mysterious Magnetosphere Of Earth
2014-05-09 03:10:38

ESA For many years, scientists have been striving to understand the constantly changing structure and behavior of the huge magnetic bubble that surrounds our planet. One approach – pioneered by Russian scientist Nikolai Tsyganenko - has been to develop models based on data sent back by spacecraft, such as ESA's Cluster quartet. As Earth sweeps around the Sun, it is constantly bombarded by energetic particles from solar storms and deep space. Fortunately, the planet generates a...

Swarm Satellites Precise Sense Of Magnetism
2014-05-08 03:26:09

ESA Although they were launched only five months ago, ESA’s trio of Swarm satellites are already delivering results with a precision that took earlier missions 10 years to achieve. Engineers have spent the last five months commissioning the identical satellites and carefully guiding them into their orbits to provide the crucial measurements that will unravel the mysteries of Earth’s magnetic field. Swarm has a challenging task ahead. Together, the satellites will measure and...

Space Weather Shielding Provided By Plasma Plumes
2014-03-07 05:41:48

April Flowers for redOrbit.com - Your Universe Online The magnetosphere, Earth's magnetic field, stretches from the core of the planet out into space. Here, the magnetosphere meets the solar wind, a stream of charged particles emitted by the sun. The magnetosphere, for the main part, acts to shield the Earth from this high-energy solar activity. When the Earth's magnetosphere comes into contact with the sun's magnetic field in a process called "magnetic reconnection," the Earth's...

Space Weather Around Venus Is Harsher Than That Around Earth
2014-02-21 14:01:57

[ Watch the Video: What's Causing Crazy Weather On Venus? ] Lee Rannals for redOrbit.com - Your Universe Online According to a study published in the Journal of Geophysical Research, space weather around Venus is much harsher than what is experienced around Earth. Scientists have discovered that the space weather around Venus can have such large explosions that they are bigger than the entire planet. They also said that these giant explosions can happen multiple times per day....

van allen probes
2013-12-21 04:46:57

April Flowers for redOrbit.com - Your Universe Online Data from NASA's Van Allen Probes mission has helped researchers resolve decades of scientific uncertainty over the origin of ultra-relativistic electrons in Earth's near space environment. The findings, published in Nature, are likely to influence our understanding of planetary magnetospheres throughout the universe. One of the primary science objectives of the Van Allen Probes is to understand the processes that control the...

Latest Magnetosphere Reference Libraries

Planetary and Space Science
2012-05-28 10:21:45

Planetary and Space Science is a peer-reviewed scientific journal established in 1959 and published by Elsevier 15 times per year. As of May 2012, the editor-in-chief is Rita Schulz (The Netherlands). The journal publishes original research articles and short communications. The main focus is on solar system processes which encompass multiple areas of the natural sciences. Research that involves planetary and space sciences involves many disciplines. Celestial mechanics is part of these...

2013-03-16 00:00:00

Hannes Olof Gösta Alfvén (May 30, 1908 - April 2, 1995) was a Swedish plasma physicist born in Norrköping, Sweden. Alfvén received his PhD from the University of Uppsala in 1934. His thesis was titled "Investigations of the Ultra-short Electromagnetic Waves." He was originally trained as an electrical power engineer and later moved on to research and teaching in the fields of plasma physics. Alfvén made many contributions to plasma physics, including theories describing the...

Ring Current
2004-10-19 04:45:44

Ring Current -- A ring current is an electric current carried by charged particles trapped in a planet's magnetosphere. It is caused by the longitudinal drift of energetic (10-200 keV) particles. Earth's Ring Current Earth's ring current is responsible for geomagnetic storms. The ring current system consists of a band, at a distance of 3-5 RE(1), which lies in the equatorial plane and circulates clockwise around the Earth (when viewed from the north). The particles of this region...

2004-10-19 04:45:41

Heliopause -- The heliopause is the boundary where our Sun's solar wind is stopped by the interstellar medium. The solar wind blows a "bubble" in the interstellar medium (the rareified hydrogen and helium gas that permeates the galaxy). The point where the solar wind's strength is no longer great enough to push back the interstellar medium is known as the heliopause, and is often considered to be the outer "border" of the solar system. The distance to the heliopause is not precisely...

2004-10-19 04:45:41

Aurora -- The Polar Aurora are natural displays of light in the sky that can be seen with the unaided eye only at night. An auroral display in the Northern Hemisphere is called the aurora borealis, or the northern lights; in the Southern Hemisphere it is called the aurora australis. Auroras are the most visible effect of the sun's activity on the earth's atmosphere. The beautiful and often eerie curtains of light in the night time sky have been observed by people for millennia. An aurora...

More Articles (7 articles) »
Word of the Day
  • The call or cry of a bird or other animal to its mate or its young.
'Call-note' is newer than 'bird-call,' which originally referred to 'an instrument for imitating the note of birds' but now also refers to 'the song or cry of a bird.'