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Fri, Apr 03, 2009

ANN's Daily Aero-Term (04.03.09): Facula

Aero-Terms!

Aero-Terms are designed to be a daily reminder of the terms, names, acronyms and explanations of the unique language that populates the aviation world. Aerospace, sport aviation, fixed wing, helo, you name it... it's all fair game.

Aero-Terms should serve as a quick but intriguing reminder of the terms you may use every day, or an introduction to an aspects of the Aero-World you may not yet be familiar with. ANN also encourages readers to go beyond the FMI link, and further research any intriguing terms.

Suggestions for future Aero-Terms are ALWAYS welcome, as are additions or discussion of the explanations given for each Aero-Term.

Facula

A bright area on the face of the Sun, commonly seen near an active region, such as a sunspot, or where such a region is about to form. Faculae, which last on average about 15 days, are best seen in blue light and are not visible at all in H-alpha. They were named by Johannes Hevelius and are thought to be caused by luminous hydrogen clouds close to the photosphere.

FMI: www.britannica.com/EBchecked/topic/200085/facula

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