After a five-year, 1.74 billion-mile journey, NASA's Juno spacecraft entered Jupiter's orbit in July 2016, to begin its mission to collect data on the structure, atmosphere, and magnetic and gravitational fields of the mysterious ...
Space Exploration
Nov 2, 2017
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The massive, churning core of conducting liquids in stars and some planets creates a dynamo that generates the planetary body's magnetic field. Researchers aim to better understand these dynamos through computer simulations ...
General Physics
May 23, 2017
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Some 50 miles up in the sky begins a dynamic region of the atmosphere known as the ionosphere. The region is filled with charged particles created by extreme ultraviolet radiation from the sun. At the base of the ionosphere, ...
Space Exploration
Jul 5, 2011
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The Earth's global magnetic field is generated in its metallic core, located nearly 3,000 kilometers beneath the planet’s surface. The field has existed on Earth for at least 3.5 billion years and offers clues about how ...
Space Exploration
Mar 25, 2010
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Sunspots change in number depending on how much magnetic activity the solar dynamo generates. But there's not total chaos: These changes occur in a cycle, which lasts about 11 years on average. The sun also experiences extended ...
Astronomy
Oct 10, 2023
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Swirling through Earth's upper atmosphere is a layer of charged particles called the ionosphere. Constantly on the move, currents through the ionosphere can be much more complicated than winds at lower altitudes, because ...
Space Exploration
Jun 20, 2013
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(Phys.org)—The Sun erupted with two prominence eruptions, one after the other over a four-hour period on Nov. 16, 2012, between the hours of 1 and 5 a.m. EST. The red-glowing looped material is plasma, a hot gas made of ...
Space Exploration
Nov 19, 2012
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At the heart of most celestial objects is a dynamo. The Earth's dynamo, spun to life in the molten metal core of our planet, generates a magnetic field that helps us find north and, perhaps more critically, shields us from ...
Plasma Physics
Jul 21, 2011
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(AP) -- Want to talk more? Keep pedaling, says Nokia.
Consumer & Gadgets
Jun 3, 2010
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(PhysOrg.com) -- In the cosmos, all celestial objects - planets, stars, galaxies and clusters of galaxies - have magnetic fields. On Earth, the magnetic field of our home planet is most easily observed in a compass where ...
Earth Sciences
Oct 9, 2009
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