![]() Small regions of the solar photosphere that are a few hundred degrees hotter than average, and which therefore appear as slightly brighter regions.Īt the poles of the Sun revisited: infrared observations A92 Unusually bright spots on the Sun's surface.įinder A small telescope, ideally of wide field of view, that is fixed to the main telescope in order to facilitate the finding of objects. īright patches that are visible on the Sun's surface, or photosphere in optical wavelengths. the bright patches on the sun's photosphereįarrum- a pancake-like structure (like those on Venus)įield- something that exists throughout space and time, as opposed to a particle that exists at only one point at a time. While the sunspots tend to make the Sun look darker, the make it look brighter. ![]() These are also magnetic areas but the magnetic field is concentrated in much smaller bundles than in sunspots. They thread the much of the solar disk, with greater concentrations around sunspot groups.Īre bright areas that are usually most easily seen near the limb, or edge, of the solar disk. Really stand out when viewed through a filter tuned to the light of calcium. A sunspot always has an associated facula, though faculae may exist apart from such spots. See more Encyclopedia articles on: Astronomy: Generalįaculae are bright granular structures on the Sun's surface that are slightly hotter than the surrounding photosphere. Magnetically heated filamentary regions which appear near the limb of the Sun.
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