Wiktionary
n. (context astronomy English) Large eruptions of luminous hydrogen gas that rise thousands of kilometers above the chromosphere of the Sun.
WordNet
n. large eruptions of luminous hydrogen gas that rise thousands of kilometers above the chromosphere
Wikipedia
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.
A prominence forms over timescales of about a day, and stable prominences may persist in the corona for several months, looping hundreds of thousands of miles into space.
The red-glowing looped material is plasma, a hot gas composed of electrically charged hydrogen and helium. The prominence plasma flows along a tangled and twisted structure of magnetic fields generated by the sun’s internal dynamo. An erupting prominence occurs when such a structure becomes unstable and bursts outward, releasing the plasma.
A typical prominence extends over many thousands of kilometers; the largest on record was estimated at over long – roughly the radius of the Sun.
Usage examples of "solar prominence".
Fast-forward, a solar prominence rose past the rim of the shadow square.
Roger drew a deep breath and bit his tongue rather firmly, but Despreaux's head whipped around and she gave the corporal a look like a solar prominence.
Ingle shook his head, picting a chain of symbolsa gnat being consumed in a solar prominence.
Three segmented metal appendages, like huge blind worms, extruded themselves from the underside of the flagship and met, their completed instrumentality throwing out a light as bright as a solar prominence.