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Topic: Magnetic Field

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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NASA says Astronomers may have solved mystery behind Planet forming Disks

 

Written by Whitney Clavin
NASA’s Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – Astronomers say that magnetic storms in the gas orbiting young stars may explain a mystery that has persisted since before 2006.

Researchers using NASA’s Spitzer Space Telescope to study developing stars have had a hard time figuring out why the stars give off more infrared light than expected. The planet-forming disks that circle the young stars are heated by starlight and glow with infrared light, but Spitzer detected additional infrared light coming from an unknown source.

Magnetic loops carry gas and dust above disks of planet-forming material circling stars, as shown in this artist's conception. (NASA/JPL-Caltech)

Magnetic loops carry gas and dust above disks of planet-forming material circling stars, as shown in this artist’s conception. (NASA/JPL-Caltech)

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NASA’s Hubble Space Telescope sees signs of Water Vapor erupting from Jupiter’s Moon Europa

 

Written by Jia-Rui C. Cook
NASA’s Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – Water vapor above the frigid south polar region of Jupiter’s moon Europa has observed by NASA’s Hubble Space Telescope, providing the first strong evidence of water plumes erupting off the moon’s surface.

Previous scientific findings from other sources already point to the existence of an ocean located under Europa’s icy crust. Researchers are not yet fully certain whether the detected water vapor is generated by erupting water plumes on the surface, but they are confident this is the most likely explanation.

This is an artist's concept of a plume of water vapor thought to be ejected off the frigid, icy surface of the Jovian moon Europa, located about 500 million miles (800 million kilometers) from the sun. (NASA/ESA/K. Retherford/SWRI)

This is an artist’s concept of a plume of water vapor thought to be ejected off the frigid, icy surface of the Jovian moon Europa, located about 500 million miles (800 million kilometers) from the sun. (NASA/ESA/K. Retherford/SWRI)

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NASA reports the Magnetic Field of our Sun is about to Reverse

 

Written by Tony Phillips
Science at NASA

NASA - National Aeronautics and Space AdministrationWashington, D.C. – Something big is about to happen on the sun. According to measurements from NASA-supported observatories, the sun’s vast magnetic field is about to flip.

“It looks like we’re no more than three to four months away from a complete field reversal,” said solar physicist Todd Hoeksema of Stanford University. “This change will have ripple effects throughout the solar system.”

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