黑子半影具有旋涡结构。
这包括对太阳黑子本影和半影持续的观测。
This includes the continuous survey of umbra and penumbra of the sunspot.
当黑子接近日面西边缘时，向中心一方的半影没有消失的趋势。
When the spot approaches the west limb, the penumbra toward the disk-center has no tendency to disappear.
这个质子活动区的主要形态特点是前导大黑子A的半影纤维的顺时针旋涡结构。
The main morphological feature of this proton active region is the clockwise spiral structure of the penumbral filaments of the large preceding spot "A".
这个质子活动区的主要形态特点是前导大黑子A的半影纤维的顺时针旋涡结构。
The main morphological feature of this proton active region is the clockwise spiral structure of the penumbral filaments of the large preceding spot "A".
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