Rare Encircling Filament

Reshared post from +Corina Marinescu

Rare Encircling Filament
We came across an oddity this week that our spacecraft has rarely observed before: a dark filament encircling an active region (Oct. 29-31, 2017). Solar filaments are clouds of charged particles that float above the sun, tethered to it by magnetic forces.

They are usually elongated and uneven strands. Only a handful of times before have we seen one shaped like a circle. (The black area to the left of the brighter active region is a coronal hole, a magnetically open region of the sun).

Credit: Solar Dynamics Observatory, NASA.
https://sdo.gsfc.nasa.gov/gallery/potw/item/854

#sun #solarfilament #nasa #space #universe

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IRIS

Reshared post from +Corina Marinescu

IRIS
NASA’s Interface Region Imaging Spectrometer, or IRIS, peers into a lower level of the Sun’s atmosphere — called the interface region — to determine how this area drives constant changes in the Sun’s outer atmosphere.

The interface region feeds solar material into the corona and solar wind: In this video, captured on Sept. 10, 2017, jets of solar material appear like tadpoles swimming down toward the Sun’s surface. These structures — called supra-arcade downflows — are sometimes observed in the corona during solar flares, and this particular set was associated with the X8.2 flare of the same day.

Source:
https://www.nasa.gov/feature/goddard/2017/september-2017s-intense-solar-activity-viewed-from-space
Credits: NASA/GSFC/LMSAL/Joy Ng

#NASA #space #universe #science #sun #plasma

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Ferrofluid Skull Sculpture

Reshared post from +Corina Marinescu

Ferrofluid Skull Sculpture
This ferrofluid skull sculpture is hauntingly beautiful. Ferrofluids become magnetized when near a magnetic field. They were originally invented by NASA in 1963.

Amazing magnetic fluids – Read & Learn:
http://science.nasa.gov/science-news/science-at-nasa/2002/23aug_mrfluids/

#scitech   #nasa   #ferrofluid   #science  

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