Astronomy Answers: From the Astronomical Dictionary

Astronomy Answers
From the Astronomical Dictionary

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The description of the word you requested from the astronomical dictionary is given below.

the prominence

'pro‧mi‧nence, plural prominences; prominere = [Latin] to stick out, be prominent

A prominence is a bright cloud of solar gas that sticks out beyond the limb of the Sun. If such a cloud is seen against the even brighter solar disk, then it appears dark and is called a filament.