同样显眼的还有北斗勺柄的左起第二颗星星北斗六开阳，她与北斗七玉衡组成一个测试眼力的视觉双星。
Notable too in skygazing lore Mizar, second star from the left in the dipper's handle, forms a vision-testing visual double star with apparently close Alcor.
同样显眼的还有北斗勺柄的左起第二颗星星北斗六开阳，她与北斗七玉衡组成一个测试眼力的视觉双星。
Notable too in skygazing lore Mizar, second star from the left in the dipper's handle, forms a vision-testing visual double star with apparently close Alcor.
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