| umbra |
the dark central region of a sunspot. undae
출처: www.astro.uio.no/ita/TNP/nineplanets/help.html
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| umbra |
From the Latin for shade, it is the shadow area defining a total eclipse. or the dark central region of a sunspot.
출처: www.exeterastro.co.uk/glossary.html
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| umbra |
a complete shadow (as of the Moon) within which the source of light (the Sun) is totally hidden from view.
출처: www.earthview.com/resources/glossary.htm
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