Also found in: Thesaurus, Encyclopedia, Wikipedia.
Related to faculae: Facular
click for a larger image
Memphis Facula (bottom right) on Jupiter's moon Ganymede, taken by
Voyager 2


n. pl. fac·u·lae (-lē′)
Any of various large bright spots or veined patches on the surface of a planet or other solar system body, or on the sun's photosphere.

[Latin, small torch, diminutive of fax, fac-, torch.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
References in periodicals archive ?
To view faculae and granulation safely through a telescope, you will need a Alter that will dim the Sun's light by a factor of about a million.
Specifically, the contrast between diffuse bright regions called faculae and the quiet solar background increases as the mix of heavy elements is increased.
Plages are bright chromospheric regions often observed near sunspots and are related to similar bright areas often seen in the photosphere, called faculae. They play an important role in the solar irradiance variability (Part I).
The spots, forming a bright area called Cerealia Facula at Occator's center and a complex of secondary spots, collectively called Vinalia Faculae, on its eastern floor, appear to be deposits of carbonate-rich salts--residue from briny flows that gurgled up from a fluid reservoir (perhaps a global ocean) deep in the asteroid's interior.
During their match, the Cosmonaut smashes the letters as he spells his word (anomaly), then starts acting strange when Webster spells his word (faculae).
A 300WXe-lamp (PLS-SXE300C, Beijing Trusttech Co., Ltd., China) was applied as the light source, which was collimated and focalized into 5 [cm.sup.2] parallel faculae. A cut-off filter (Kenko, L-42; [lambda] > 420 nm) was employed to obtain the visible-light irradiation ([lambda] > 420 nm).
Each proof will be discussed relative to the liquid metallic hydrogen (LMH) model [36, 39, 47, 48] wherein condensed hydrogen, pressurized in the solar interior, assumes a graphite-like lattice on the photosphere [39,40,45,48], a more metallic nature in sunspots and faculae [40,45,52], a diffuse presence in a somewhat cool corona [57,58,60], and a solid character in the core [50].
Its activity manifests itself as dark sunspots and bright faculae on its visible surface, as well as violent mass ejections and the acceleration of high-energy particles resulting from the release of magnetic energy in its outer atmosphere.
AR1589 N14[degrees]/266[degrees] was seen near the eastern limb on Oct 10 type Dko comprising two irregular penumbral sunspots and surrounded by an extensive area of faculae. By Oct 13 one of the penumbral sunspots had decayed to leave a compact collection of several smaller penumbral spots, the total area being approximately 160 millionths.
Its face shows much less detail, usually no more than a few little sunspots and maybe some white faculae (bright Sun-clouds) around the edge.
Scientists compared climate data from the past millennium to changes in solar brightness produced by dark sunspots and bright points called faculae.
In the new images, the faculae look like towering walls.

Full browser ?