sunspot group

Morphological analysis of a large sunspot group in October 1972

1972年10月太阳大黑子群的形态分析

The green coronal line above sunspot group of No. 5629 of 5 Agu.

我们观测了1989年8月5日博尔德编号5629号黑子群上方的、具有激发连续谱和明亮节点的绿日冕光谱线.

sunspot group classifications by magnetic polarity

黑子群磁性分类

The magnetic field and flares of great sunspot group in late April 1978

1978年4月底大黑子群的磁场和耀斑

large sunspot group ar 9169 moved across the sun during 2000 september and decayed in a few weeks.

大型太阳黑子团AR9169在2000年9月穿过了太阳，在几周内衰退了。

in view of its physical nature such a sunspot group actually has a structure of its own.

从物理性质方面来看黑子群实际上有它自身的结构。3.Large sunspot group AR 9169 from the last solar cycle is visible as the bright area near the horizon.最近一次太阳活动周期中的大型太阳黑子团AR9169可以在图中靠近地平面的明亮区域中看到。