No Iron Dynamo

December 21, 2020 Many previous Pictures of the Day discuss the planet Jupiter—especially its electromagnetic interaction with its moons and the rest of the Solar System. Jupiter’s magnetosphere extends outward for nearly 650 million kilometers; beyond the orbit of the planet Saturn. Belts of ionized particles surround Jupiter, with the most energetic…

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What Science Says

December 18, 2020 It’s common to hear people refer to “what science says.” The usual assumption is that “what science says” is said indefeasibly. But the term ‘science’ has two conflicting senses: science as currently-accepted theory (CAT) and science as method. To conclude that method inevitably leads to CAT and,…

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Jet Modes

December 16, 2020 Black hole physics remains questionable. “One thing that I’m sure of is the real pleasure of life – it’s not being known, it’s not having your own jet plane, it’s not having a mansion. The pleasure is to learn something.”— Francis Ford Coppola According to a recent…

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The Dynamic Sun

Dec 15, 2020 The Sun is a plasma phenomenon. The Solar Dynamics Observatory records coronal holes as they move across the Sun’s photosphere, causing storms of charged particles to blast toward Earth. Heliophysicists believe that coronal holes are regions of “open magnetic fields”. The Sun’s temperature in its core is…

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More Details Emerge

December 11, 2020 Hourglass-shaped lobes of X-rays extend about 65,000 light-years out from each side of the Milky Way’s central bulge. Rather than “bubbles” of radiation, the lobes are the signature of Birkeland currents moving through plasma and electrically charged dust. The intense electromagnetic fields associated with Birkeland currents cause…

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