梅西耶32
参考资料

1 2 3 4 5 6 7 8 9  . Results for NGC 221.   [2006-11-29]. （原始内容存档于2018-12-25）.
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↑  Diameter = distance × sin(diameter_angle) = 6.5 ± 0.2 thousand light-years. diameter
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