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Topic: Magnetic Field

NASA’s Magnetospheric Multiscale Probe set to launch March 12th

 

Written by Karen C. Fox
NASA’s Goddard Space Flight Center

NASA - National Aeronautics and Space AdministrationGreenbelt, MD – The Magnetospheric Multiscale, or MMS, mission is scheduled to launch into space on March 12th, 2015. The mission consists of four spacecraft to observe a phenomenon called magnetic reconnection — which doesn’t happen naturally on Earth all that often, but is a regular occurrence in space.

At the heart of magnetic reconnection is a fundamental physics process in which magnetic field lines come together and explosively realign, often sending the particles in the area flying off near the speed of light.

Solar flares – such as this one captured by NASA's SDO on July 12, 2012, are initiated by a phenomenon called magnetic reconnection. (NASA/SDO)

Solar flares – such as this one captured by NASA’s SDO on July 12, 2012, are initiated by a phenomenon called magnetic reconnection. (NASA/SDO)

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NASA’s Cassini spacecraft observes Saturn’s moon Titan in the Solar Wind

 

Written by Preston Dyches
NASA’s Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – Researchers studying data from NASA’s Cassini mission have observed that Saturn’s largest moon, Titan, behaves much like Venus, Mars or a comet when exposed to the raw power of the solar wind. The observations suggest that unmagnetized bodies like Titan might interact with the solar wind in the same basic ways, regardless of their nature or distance from the sun.

Titan is large enough that it could be considered a planet if it orbited the sun on its own, and a flyby of the giant moon in December 2013 simulated that scenario, from Cassini’s vantage point.

This diagram depicts conditions observed by NASA's Cassini spacecraft during a flyby in Dec. 2013, when Saturn's magnetosphere was highly compressed, exposing Titan to the full force of the solar wind. (NASA/JPL-Caltech)

This diagram depicts conditions observed by NASA’s Cassini spacecraft during a flyby in Dec. 2013, when Saturn’s magnetosphere was highly compressed, exposing Titan to the full force of the solar wind. (NASA/JPL-Caltech)

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NASA takes a look back at 2014

 

Written by David Weaver
NASA Headquarters

NASA - National Aeronautics and Space AdministrationWashington, D.C. – In 2014, NASA took significant steps on the agency’s journey to Mars — testing cutting-edge technologies and making scientific discoveries while studying our changing Earth and the infinite universe as the agency made progress on the next generation of air travel.

“We continued to make great progress on our journey to Mars this year, awarding contracts to American companies who will return human space flight launches to U.S. soil, advancing space technology development; and successfully completing the first flight of Orion, the next deep space spacecraft in which our astronauts will travel,” said NASA Administrator Charles Bolden. “We moved forward on our work to create quieter, greener airplanes and develop technologies to make air travel more efficient; and we advanced our study of our changing home planet, Earth, while increasing our understanding of others in our solar system and beyond.”

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NASA’s Cassini Spacecraft was bathed in beam of electrons during flyby of Saturn’s moon Hyperion

 

Written by Preston Dyches
NASA’s Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – Static electricity is known to play an important role on Earth’s airless, dusty moon, but evidence of static charge building up on other objects in the solar system has been elusive until now.

A new analysis of data from NASA’s Cassini mission has revealed that, during a 2005 flyby of Saturn’s moon Hyperion, the spacecraft was briefly bathed in a beam of electrons coming from the moon’s electrostatically charged surface.

Cassini obtained this false-color view of Saturn's chaotically tumbling moon Hyperion during a flyby on Sept. 26, 2005. The spacecraft detected a strong electrostatic charge on the moon's surface, a first for any body other than Earth's moon. (NASA/JPL-Caltech/Space Science Institute)

Cassini obtained this false-color view of Saturn’s chaotically tumbling moon Hyperion during a flyby on Sept. 26, 2005. The spacecraft detected a strong electrostatic charge on the moon’s surface, a first for any body other than Earth’s moon. (NASA/JPL-Caltech/Space Science Institute)

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NASA looks back at the July 2012 Solar Superstorm that just missed Earth

 

Written by Tony Phillips
Science at NASA

NASA - National Aeronautics and Space AdministrationWashington, D.C. – If an asteroid big enough to knock modern civilization back to the 18th century appeared out of deep space and buzzed the Earth-Moon system, the near-miss would be instant worldwide headline news.

Two years ago, Earth experienced a close shave just as perilous, but most newspapers didn’t mention it. The “impactor” was an extreme solar storm, the most powerful in as much as 150+ years.

“If it had hit, we would still be picking up the pieces,” says Daniel Baker of the University of Colorado.

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NASA’s Fermi Gamma-ray Space Telescope sees Pulsar Transformation

 

Written by Francis Reddy
NASA’s Goddard Space Flight Center

NASA - National Aeronautics and Space AdministrationGreenbelt, MD – In late June 2013, an exceptional binary containing a rapidly spinning neutron star underwent a dramatic change in behavior never before observed.

The pulsar’s radio beacon vanished, while at the same time the system brightened fivefold in gamma rays, the most powerful form of light, according to measurements by NASA’s Fermi Gamma-ray Space Telescope.

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NASA reports Sun has entered Solar Max of it’s solar cycle

 

Written by Dr. Tony Phillips
Science at NASA

NASA - National Aeronautics and Space AdministrationWashington, D.C. – Years ago, in 2008 and 2009 an eerie quiet descended on the sun. Sunspot counts dropped to historically-low levels and solar flares ceased altogether. As the longest and deepest solar minimum in a century unfolded, bored solar physicists wondered when “Solar Max” would ever return.

They can stop wondering. “It’s back,” says Dean Pesnell of the Goddard Space Flight Center. “Solar Max has arrived.”

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NASA’s MAVEN spacecraft to examine Solar Wind’s roll in Mars losing it’s Atmosphere

 

Written by Claire Saravia
NASA’s Goddard Space Flight Center

NASA - National Aeronautics and Space AdministrationGreenbelt, MD – This past November, NASA launched the Mars Atmosphere and Volatile Evolution (MAVEN) mission in the hope of understanding how and why the planet has been losing its atmosphere over billions of years.

One instrument aboard the spacecraft will study a special component of the Martian atmosphere to help solve this mystery. By studying ions, or small electrically charged particles, in and above the Red Planet’s tenuous atmosphere, the Solar Wind Ion Analyzer will help answer why Mars has gradually lost much of its atmosphere, developing into a frozen, barren planet.

This artist's concept shows the MAVEN spacecraft orbiting Mars. (Credit: NASA/Goddard Space Flight Center)

This artist’s concept shows the MAVEN spacecraft orbiting Mars. (Credit: NASA/Goddard Space Flight Center)

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NASA’s Planck Space Telescope captures picture of Milky Way Galaxy’s Magnetic Field

 

Written by Whitney Clavin
NASA’s Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – A new image from the Planck space telescope reveals the magnetic field lines of our Milky Way galaxy. The fingerprint-like map allows astronomers to study the structure of the magnetic field and better understand the process of star formation.

The image, compiled from the first all-sky observations of polarized light emitted by interstellar dust in the Milky Way, is available here.

The magnetic field of our Milky Way galaxy as seen by the Planck satellite, a European Space Agency mission with significant NASA contributions. This image was compiled from the first all-sky observations of polarized light emitted by interstellar dust in the Milky Way.

The magnetic field of our Milky Way galaxy as seen by the Planck satellite, a European Space Agency mission with significant NASA contributions. This image was compiled from the first all-sky observations of polarized light emitted by interstellar dust in the Milky Way.

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NASA’s twin Van Allen Probes spacecraft discover stripe pattern in one radiation belt around Earth

 

Written by Geoff Brown / Karen C. Fox
APL / NASA’s Goddard Space Flight Center

NASA - National Aeronautics and Space AdministrationGreenbelt, MD – Scientists have discovered a new, persistent structure in one of two radiation belts surrounding Earth. NASA’s twin Van Allen Probes spacecraft have shown that high-energy electrons in the inner radiation belt display a persistent pattern that resembles slanted zebra stripes.

Surprisingly, this structure is produced by the slow rotation of Earth, previously considered incapable of affecting the motion of radiation belt particles, which have velocities approaching the speed of light.

Two giant belts of radiation surround Earth. The inner belt is dominated by electrons and the outer one by protons.  (NASA)

Two giant belts of radiation surround Earth. The inner belt is dominated by electrons and the outer one by protons.
(NASA)

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