注意两颗邻近的星星，参宿七和哈达尔。
只有两个失踪星级职务是参宿四和参宿七。
The only two missing star positions are for Betelgeuse and Rigel.
这形状奇怪的反射星云位于猎户座内，与明亮的参宿七有联系。
This suggestively shaped reflection nebula is associated with the bright star Rigel in the constellation Orion.
应用推荐