facula
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He considers it indeed "highly probable that the preparatory sign of a new spot is always a small, bright patch of facula."
From A Popular History of Astronomy During the Nineteenth Century Fourth Edition by Agnes M. (Agnes Mary) Clerke
Stellar contamination refers to the influence of the star's own features, such as dark spots and bright faculae, on the measurements of the exoplanet's atmosphere.
From Science Daily ● Sep. 25, 2023
"In addition to the contamination from stellar spots and faculae, we saw a stellar flare, an unpredictable event during which the star looks brighter for several minutes or hours," said Lim.
From Science Daily ● Sep. 25, 2023
But the absence of other signs of magnetic activity, such as bright patches of very hot gas known as faculae more than compensates for this effect.
From Science Magazine ● May 26, 2011
Even during a prolonged minimum, they claim, an extensive network of very small faculae on the sun’s hot surface remains to keep the energy output above a certain threshold level.
From Science Magazine ● May 26, 2011
When the ascending currents are powerful, they create those appearances which astronomers designate the nuclei, the penumbrae, the faculae.
From The Story of the Herschels by Anonymous
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