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Topic: Magnetic Field

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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NASA says Scientists on International Space Station researching “Genius Materials”

 

Written Dr. Tony Phillips
Science at NASA

NASA - National Aeronautics and Space AdministrationWashington, D.C. – If you have a smartphone, take it out and run your fingers along the glass surface. It’s cool to the touch, incredibly thin and strong, and almost impervious to scratching. You’re now in contact with a “smart material.”

Smart materials don’t occur naturally. Instead, they are designed by human engineers working at the molecular level to produce substances made-to-order for futuristic applications.

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NASA’s Voyager 1 spacecraft sends the Sounds of Interstellar Space

 

Written by Tony Phillips
Science at NASA

NASA - National Aeronautics and Space AdministrationWashington, D.C. – Scifi movies are sometimes criticized when explosions in the void make noise. As the old saying goes, “in space, no one can hear you scream.” Without air there is no sound.

But if that’s true, what was space physicist Don Gurnett talking about when he stated at a NASA press conference in September 2013 that he had heard “the sounds of interstellar space?”

It turns out that space can make music … if you know how to listen.

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NASA says the Magnetic Field of the Sun is about to change Polarity

 

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 3 to 4 months away from a complete field reversal,” says solar physicist Todd Hoeksema of Stanford University. “This change will have ripple effects throughout the solar system.”

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NASA’s Interstellar Boundary Explorer Maps our Solar System’s Tail

 

NASA - National Aeronautics and Space AdministrationWashington, D.C. – Like a comet, the solar system has a tail. NASA’s Interstellar Boundary Explorer (IBEX) has for the first time mapped out the structure of this tail, which is shaped like a four-leaf clover.

Scientists describe the tail, called the heliotail, based on the first three years of IBEX imagery in a paper published in the July 10th edition of the Astrophysical Journal.

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NASA’s Voyager 1 Spacecraft nears edge of our Solar System and will soon enter Interstellar Space

 

NASA - National Aeronautics and Space AdministrationPasadena, CA – Data from NASA’s Voyager 1, now more than 11 billion miles (18 billion kilometers) from the sun, suggest the spacecraft is closer to becoming the first human-made object to reach interstellar space.

Research using Voyager 1 data and published in the journal Science today provides new detail on the last region the spacecraft will cross before it leaves the heliosphere, or the bubble around our sun, and enters interstellar space.

This artist's concept shows NASA's two Voyager spacecraft exploring a turbulent region of space known as the heliosheath, the outer shell of the bubble of charged particles around our sun. (Image Credit: NASA/JPL-Caltech)

This artist’s concept shows NASA’s two Voyager spacecraft exploring a turbulent region of space known as the heliosheath, the outer shell of the bubble of charged particles around our sun. (Image Credit: NASA/JPL-Caltech)

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NASA’s Galileo mission observations of Saturn’s moon Europa gives target areas for future study

 

Written by Guy Webster
NASA’s Jet Propulsion Laboratory

NASA - National Aeronautics and Space AdministrationPasadena, CA – The surface of Jupiter’s moon Europa exposes material churned up from inside the moon and also material resulting from matter and energy coming from above.

If you want to learn about the deep saltwater ocean beneath this unusual world’s icy shell — as many people do who are interested in possible extraterrestrial life — you might target your investigation of the surface somewhere that has more of the up-from-below stuff and less of the down-from-above stuff.

This graphic of Jupiter's moon Europa maps a relationship between the amount of energy deposited onto the moon from charged-particle bombardment and the chemical contents of ice deposits on the surface in five areas of the moon (labeled A through E). (Credit: NASA/JPL-Caltech/Univ. of Ariz./JHUAPL/Univ. of Colo.)

This graphic of Jupiter’s moon Europa maps a relationship between the amount of energy deposited onto the moon from charged-particle bombardment and the chemical contents of ice deposits on the surface in five areas of the moon (labeled A through E). (Credit: NASA/JPL-Caltech/Univ. of Ariz./JHUAPL/Univ. of Colo.)

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