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In solar physics, a prominence, sometimes referred to as a filament, [a] is a large plasma and magnetic field structure extending outward from the Sun's surface, often in a loop shape. Prominences are anchored to the Sun's surface in the much brighter photosphere , and extend outwards into the solar corona .
A typical prominence extends over many thousands of kilometers; the largest on record was estimated at over 800,000 kilometres (500,000 mi) long [24] – roughly the solar radius. When a prominence is viewed against the Sun instead of space, it appears darker than the background. This formation is called a solar filament. [24]
On the contrary, quiescent prominences are large, cool, dense structures which are observed as dark, "snake-like" Hα ribbons (appearing like filaments) on the solar disc. Their temperature is about 5 000 – 8 000 K, and so they are usually considered as chromospheric features.
Solar prominences, explains NASA, are large, bright loops of plasma anchored to the Sun's surface in the photosphere — the visible surface of the Sun — that extend into the Sun's outer ...
The early evolution of CMEs is frequently associated with other solar phenomena observed in the low corona, such as eruptive prominences and solar flares. CMEs that have no observed signatures are sometimes referred to as stealth CMEs. [11] [12] Prominences embedded in some CME pre-eruption structures may erupt with the CME as eruptive prominences.
Typical coronal loops observed by TRACE Dynamics of coronal loops observed by SDO. In solar physics, a coronal loop is a well-defined arch-like structure in the Sun's atmosphere made up of relatively dense plasma confined and isolated from the surrounding medium by magnetic flux tubes.
Helmet streamers during a total solar eclipse, photographed using exposure bracketing to show both the Sun's corona and the surface features of the new moon itself, illuminated by earthshine. A few solar prominences are visible around the lunar limb.
The race for female actor in a comedy series pitted host Kristen Bell vs. presenter Quinta Brunson vs. almost-host Jean Smart vs. two co-workers (Liza Colón-Zayas and Ayo Edebiri) from The Bear.