| Solar faculae explained (829 words) |
 | Faculae were shown to be associated with strong magnetic fields nearly 40 years ago and a plausible physical explanation for them was proposed by Spruit already in his 1976 and 1977 papers. |
| Interest in faculae increased with the discovery that the total solar irradiance increases when the sun is more active, which may be contrary to expectations since high activity also means more dark sunspots. |
| Sunspots and faculae modulate the total solar energy output and they are thus relevant for studies of climate change. |
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