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Recent Articles
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Topic: AurorasWritten by Miles Hatfield
The beautiful lights are just the visible product of these collisions — the kinetic and thermal energy released, invisible to the naked eye, are no less important. Understanding the contribution that aurora make to the total amount of energy that enters and leaves Earth’s geospace system — referred to as auroral forcing — is one of the major goals of the NASA-funded Auroral Zone Upwelling Rocket Experiment, or AZURE. «Read the rest of this article» Sections: Technology | No Comments
NASA’s THEMIS Mission helps reveal mystery of Pulsating AuroraWritten by Mara Johnson-Groh
While scientists have long known auroras to be associated with solar activity, the precise mechanism of pulsating auroras was unknown. Now, new research, using data from NASA’s Time History of Events and Macroscale Interactions during Substorms — or THEMIS — mission and Japan’s Exploration of energization and Radiation in Geospace — shortened to ERG, or also known as Arase — satellite, has finally captured the missing link thought responsible for these auroras. «Read the rest of this article» Sections: Sports | No Comments
NASA’s Juno mission observes Jupiter’s Auroras acting differently than expectedWritten by DC Agle
Examining data collected by the ultraviolet spectrograph and energetic-particle detector instruments aboard the Jupiter-orbiting Juno spacecraft, a team led by Barry Mauk of the Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland, observed signatures of powerful electric potentials, aligned with Jupiter’s magnetic field, that accelerate electrons toward the Jovian atmosphere at energies up to 400,000 electron volts. ![]() This is a reconstructed view of Jupiter’s northern lights through the filters of the Juno Ultraviolet Imaging Spectrograph instrument on Dec. 11, 2016, as the Juno spacecraft approached Jupiter, passed over its poles, and plunged towards the equator. (NASA/JPL-Caltech/Bertrand Bonfond ) «Read the rest of this article» Sections: Technology | No Comments
NASA’s Juno Spacecraft makes Fifth Flyby of JupiterWritten by DC Agle
All of Juno’s science instruments and the spacecraft’s JunoCam were operating during the flyby, collecting data that is now being returned to Earth. Juno’s next close flyby of Jupiter will occur on May 19th, 2017. NASA’s Juno spacecraft made its fifth flyby over Jupiter’s mysterious cloud tops on Monday, March 27th, at 1:52am PDT (4:52am EDT, 8:52 UTC). ![]() This enhanced-color image of a mysterious dark spot on Jupiter seems to reveal a Jovian “galaxy” of swirling storms. (NASA/JPL-Caltech/SwRI/MSSS/Roman Tkachenko) «Read the rest of this article» Sections: Technology | No Comments
NASA launches Three Sounding Rockets to study Alaska AurorasWritten by Keith Koehler
The instruments were successfully carried on Black IX sounding rockets from the Poker Flat Research Range north of Fairbanks. The first two rockets were launched nearly simultaneously at 12:41am and 12:42:30am EST as part of the Neutral Jets in Auroral Arcs mission. ![]() Two NASA sounding rockets are launched 90-seconds apart into an active aurora from the Poker Flat Research Range in Alaska. (NASA/Terry Zaperach) «Read the rest of this article» Sections: Technology | No Comments
NASA discovers low-energy electrons play role in Pulsating AurorasWritten by Sarah Frazier
In this study, published in the Journal of Geophysical Research, scientists compared ground-based videos of pulsating auroras—a certain type of aurora that appears as patches of brightness regularly flickering on and off—with satellite measurements of the numbers and energies of electrons raining down towards the surface from inside Earth’s magnetic bubble, the magnetosphere. ![]() This image of a colorful aurora was taken in Delta Junction, Alaska, on April 10, 2015. All auroras are created by energetic electrons, which rain down from Earth’s magnetic bubble and interact with particles in the upper atmosphere to create glowing lights that stretch across the sky. (Image courtesy of Sebastian Saarloos) «Read the rest of this article» Sections: Technology | No Comments
NASA study discovers Brown Dwarfs have strong Auroras around themWritten by Elizabeth Landau
But a new study in the journal Nature suggests they succeed in creating powerful auroral displays, similar to the kind seen around the magnetic poles on Earth. “This is a whole new manifestation of magnetic activity for that kind of object,” said Leon Harding, a technologist at NASA’s Jet Propulsion Laboratory, Pasadena, California, and co-author on the study. ![]() This artist’s concept shows an auroral display on a brown dwarf. If you could see an aurora on a brown dwarf, it would be a million times brighter than an aurora on Earth. (Chuck Carter and Gregg Hallinan/Caltech) «Read the rest of this article» Sections: Technology | No Comments
NASA’s MAVEN spacecraft detects Auroras around MarsWritten by Tony Phillips
In late December 2014, NASA’s MAVEN spacecraft detected evidence of widespread auroras in Mars’s northern hemisphere. The “Christmas Lights,” as researchers called them, circled the globe and descended so close to the Martian equator that, if the lights had occurred on Earth, they would have been over places like Florida and Texas. “It really is amazing,” says Nick Schneider who leads MAVEN’s Imaging Ultraviolet Spectrograph (IUVS) instrument team at the University of Colorado. “Auroras on Mars appear to be more wide ranging than we ever imagined.” ![]() A map of MAVEN’s Imaging Ultraviolet Spectrograph (IUVS) auroral detections in December 2014 overlaid on Mars’ surface. The map shows that the aurora was widespread in the northern hemisphere, not tied to any geographic location. The aurora was detected in all observations during a 5-day period. (University of Colorado) «Read the rest of this article» Sections: Technology | No Comments
NASA to launch Magnetospheric Multiscale mission to study explosions in Earth’s Magnetic FieldWritten by Dr. Tony Phillips
It operates anywhere magnetic fields pervade space–which is to say almost everywhere. In the cores of galaxies, magnetic reconnection sparks explosions visible billions of light-years away. On the sun, it causes solar flares as powerful as a million atomic bombs. At Earth, it powers magnetic storms and auroras. It’s ubiquitous. The problem is, researchers can’t explain it. «Read the rest of this article» Sections: Technology | No Comments
NASA’s Cassini spacecraft and Hubble Space Telescope capture unique view of Saturn’s AurorasWritten by Jia-Rui Cook
While NASA’s Hubble Space Telescope, orbiting around Earth, was able to observe the northern auroras in ultraviolet wavelengths, NASA’s Cassini spacecraft, orbiting around Saturn, got complementary close-up views in infrared, visible-light and ultraviolet wavelengths. Cassini could also see northern and southern parts of Saturn that don’t face Earth. «Read the rest of this article» Sections: Technology | No Comments
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