Generally the faculae are numerous around the dark spots, and absorption of the sun's light by his own atmosphere affords a darker background for them, with better visibility nearer the rim of the solar disk.
Faculae and prominences are more closely related than the sun spots and prominences.
The brighter streaks and mottlings known as faculae are probably elevations above the general photosphere, and seem to be crusts of luminous matter, often incandescent calcium, protruding through from the lower levels.
The spectroheliograph reveals vast zones of faculae otherwise invisible, related to the sun-spot zones proper on both sides of the equator.
They find that the faculae retain nearly the same appearance for days together, and consider them to be small particles of solid or liquid matter in suspension, and composed of the same cloudy matter as the luminous surface of the sun.
The reason that the faculae appear brighter is, that on account of their height above the solar surface, they are less dimmed by passing through its atmosphere.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "faculae" in a variety of sentences. We hope that you will now be able to make sentences using this word.
