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单词 limb-darkening
释义

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limb-darkening
limb-darkening n. Astronomy the apparent darkening of the face of the sun towards its edges.
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the world > the universe > sun > sunlight > [noun] > limb-darkening
limb-darkening1931
1931 Monthly Notices Royal Astron. Soc. XCI. 893 I(x) is of the form amx (limb darkening linearly proportional to distance from the centre).
1938 Astrophysical Jrnl. 87 45 (heading) The effect of an adiabatic layer upon solar limb darkening.
1962 Sci. Surv. 3 103 Visual observations..show that the sun's disc is brightest at the centre, becoming gradually dimmer towards the outer edge, or limb. This phenomenon is known as limb darkening, and is due to the fact that we look less and less deeply into the hotter layers of the sun as we view its surface more obliquely.
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