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heliophobia.
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Limb darkening is the observation of the center part of a star appearing brighter than the edge or limb of the luminous disk.
In 1902, Frank Very demonstrated that limb darkening was a frequency dependent phenomenon [101] which he attributed to scattering in the solar atmosphere and reflection with carbon particles.
2) the limb darkening of the photosphere, 3) the directional spectral emissivity of sunspots, and 4) the directional spectral emissivity of granulations [28], the emissivity of faculae constitutes one of the most powerful lines of evidence that the Sun is condensed matter.
Other than perhaps limb darkening, there isn't much to see on this diminutive orb.
As a result, it has been nearly impossible to synthesize a realistic and cohesive portrayal of sunspots, granulation, and limb darkening, even though a cursory review of the question suggests otherwise.
A discussion of each physical feature follows: (1) the thermal spectrum, (2) limb darkening, (3) solar collapse, (4) the solar density, (5) seismic activity, (6) mass displacement, (7) the chromosphere and critical opalescence, (8) shape, (9) surface activity, (10) photospheric/coronal flows, (11) photospheric imaging, (12) the solar dynamo, and (13) the presence of Sun spots.
When the planet is near quadrature, one limb will have more pronounced limb darkening than the other.
Comas Sola never reported limb darkening on these four virtually airless bodies.
The lack of contrast between Uranus's pallid disk and the dark sky background also accentuates the planet's limb darkening, making it difficult to confirm whether its image is even in focus.
The black drop is caused by blurring due to Earth's atmosphere and telescopic diffraction, combined with the Sun's strong limb darkening at its extreme edge.
Once I'm satisfied with the color adjustments, my final step is to reduce the limb darkening on the solar disk.