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#magneticfield

1 post1 participant0 posts today
Benjamin Carr, Ph.D. 👨🏻‍💻🧬

#SpaceX launches a pair of #NASA #satellites to probe the origins of #spaceweather
Twin #spacecraft are part of #TRACERS mission, which will spend at least a year measuring #plasma conditions in narrow regions of #Earth's #magneticfield known as polar cusps. These regions are located over the poles. They play an important but poorly understood role in creating colorful auroras as plasma streaming out from the Sun interacts with the magnetic field surrounding Earth.
arstechnica.com/space/2025/07/

Ars Technica · SpaceX launches a pair of NASA satellites to probe the origins of space weatherBy Stephen Clark
Benjamin Carr, Ph.D. 👨🏻‍💻🧬

Sound of #Earth's Flipping #MagneticField Is an Unforgettable Horror
Combining the satellite data with evidence of magnetic field line movements on Earth, geoscientists mapped the Laschamps event and represented it using natural noises like the creaking of wood and the crashing of colliding rocks.
The resulting compilation – unveiled in 2024 by the Technical University of Denmark and the German Research Center for Geosciences – is unlike anything you've ever heard.
sciencealert.com/sound-of-eart

ScienceAlert · Sound of Earth's Flipping Magnetic Field Is an Unforgettable HorrorEarth's magnetic field dramatically flipped roughly 41,000 years ago.
Benjamin Carr, Ph.D. 👨🏻‍💻🧬

#Jupiter was formerly twice its current size and had a much stronger #magneticfield, study says
A new study reveals that about 3.8 million years after the solar system's first solids formed, Jupiter was twice its current size with a magnetic field 50 times stronger, profoundly influencing the structure of the early solar system.
phys.org/news/2025-05-jupiter-

phys.orgJupiter was formerly twice its current size and had a much stronger magnetic field, study saysUnderstanding Jupiter's early evolution helps illuminate the broader story of how our solar system developed its distinct structure. Jupiter's gravity, often called the "architect" of our solar system, played a critical role in shaping the orbital paths of other planets and sculpting the disk of gas and dust from which they formed.
Nicole Sharp

Glimpses of Coronal Rain

Despite its incredible heat, our sun‘s corona is so faint compared to the rest of the star that we can rarely make it out except during a total solar eclipse. But a new adaptive optic technique has given us coronal images with unprecedented detail.

These images come from the 1.6-meter Goode Solar Telescope at Big Bear Solar Observatory, and they required some 2,200 adjustments to the instrument’s mirror every second to counter atmospheric distortions that would otherwise blur the images. With the new technique, the team was able to sharpen their resolution from 1,000 kilometers all the way down to 63 kilometers, revealing heretofore unseen details of plasma from solar prominences dancing in the sun’s magnetic field and cooling plasma falling as coronal rain.

The team hope to upgrade the 4-meter Daniel K. Inouye Solar Telescope with the technology next, which will enable even finer imagery. (Image credit: Schmidt et al./NJIT/NSO/AURA/NSF; research credit: D. Schmidt et al.; via Gizmodo)

#flowVisualization#fluidDynamics#magneticField
Nicole Sharp

Salt Affects Particle Spreading

Microplastics are proliferating in our oceans (and everywhere else). This video takes a look at how salt and salinity gradients could affect the way plastics move. The researchers begin with a liquid bath sandwiched between a bed of magnets and electrodes. Using Lorentz forcing, they create an essentially 2D flow field that is ordered or chaotic, depending on the magnets’ configuration. Although it’s driven very differently, the flow field resembles the way the upper layer of the ocean moves and mixes.

The researchers then introduce colloids (particles that act as an analog for microplastics) and a bit of salt. Depending on the salinity gradient in the bath, the colloids can be attracted to one another or repelled. As the team shows, the resulting spread of colloids depends strongly on these salinity conditions, suggesting that microplastics, too, could see stronger dispersion or trapping depending on salinity changes. (Video and image credit: M. Alipour et al.)

#2024gofm#electrohydrodynamics#flowVisualization
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