Solar prominence 28/03/2015



A prominence is a large, bright, gaseous feature extending outward from the Sun’s surface, often in a loop shape. Prominences are anchored to the Sun’s surface in the photosphere, and extend outwards into the Sun’s corona. While the corona consists of extremely hot ionized gases, known as plasma, which do not emit much visible light, prominences contain much cooler plasma, similar in composition to that of the chromosphere. The prominence plasma is typically a hundred times cooler and denser than the coronal plasma. A prominence forms over timescales of about a day, and prominences may persist in the corona for several weeks or months. Some prominences break apart and may then give rise to coronal mass ejections. Scientists are currently researching how and why prominences are formed.

Imaging telescopes or lenses: Vixen 102/1000 ED
Imaging cameras: ZWO optical ASI 120mm
Mounts: SkyWatcher HEQ5 PRO
Software: Adobe Photoshop 2 CS, AutoStakkert! 2
Filters: Coronado Solarmax 60
Автор: Beppe Scotti
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