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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Mecca, Saudi Arabia | Pléiades Satellite Image

Reshared post from +Friends of NASA

Mecca, Saudi Arabia | Pléiades Satellite Image
"Mecca (Arabic: مكة‎) is a city in the Hejaz and the capital of Makkah Province in Saudi Arabia. The city is located 70 km (43 mi) inland from Jeddah in a narrow valley at a height of 277 m (909 ft) above sea level. Its resident population in 2012 was roughly 2 million, although visitors more than triple this number every year during Hajj period held in the twelfth Muslim lunar month of Dhu al-Hijjah."

"As the birthplace of Muhammad and a site of Muhammad's first revelation of the Quran (the site being a cave 3.2 km (2 mi) from Mecca), Mecca is regarded as the holiest city in the religion of Islam and a pilgrimage to it known as the Hajj is obligatory for all able Muslims. Mecca is home to the Kaaba, by majority description Islam's holiest site, as well as being the direction of Muslim prayer."

Image Credit: Airbus Defence & Space
Caption Credit: Wikipedia

+Airbus Group 
+CNES 

#Space #Earth #Satellite #Mecca #SaudiaArabia #مكة #History #Islam   #الإسلام#Muslim #Muhammad #Quran #Religion #Hajj #Prayer #LEO #Orbit #Pléiades #Observation #European #French #Arabic

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