推荐回答(4个)
猎户座主要由七颗恒星组成,它们都是亮星,猎户座面积不是最大的,全天排名第26,但它是全天八十八星座中最耀眼的星座(因为它明亮的成员)

猎户座α星——参宿四在猎户座的左上角,它是猎户座的主星,十分显眼,全天亮度排名第十,视星等0.58等距我们640光年。参宿四是一颗红超巨星,光谱为M2Ia,是体积最大的恒星之一,直径可以装下1179个太阳,但质量只有太阳的11倍,它已经处在生命的末期,估计不久会以超新星爆炸的形式消亡,最近,它的亮度急剧降低,现在已经降到了1.5等,引起了不少天文学家的注意。

β星参宿七是猎户座的最亮星,视星等0.12,它在猎户座的右下方,亮度全天排名第七,距我们863光年。它实质是一颗蓝超巨星,光谱为B8Ia,参宿七十分巨大,直径为太阳的78倍,质量可达太阳的21倍,它强大的辐射量可摧毁它所有的行星。

γ星参宿五在参宿四的右下方,猎户座的右上方,它是该星座第三亮星,视星等1.6。它是一颗光谱为B2Ⅲ的巨星,直径为太阳的5.75倍,质量是太阳的8.5倍,它的氢燃料即将耗尽,在几百万年后,会开启氦聚变
在猎户座中央,有一条腰带,由三颗恒星组成,它们被称为福禄寿三星,“三星高照,福运来到”就是说,每到春节期间,三星就会在天空的最顶端,这三颗恒星从左到右分别是参宿一、参宿二、参宿三。它们的质量真可谓是出类拔萃,它们是恒星界中最大的1/1000万
参宿一(猎户座ζ星),它的视星等为2.05等。距我们1200光年,参宿一是一颗质量很高的晚型O型超巨星,它的光谱为O9.7Iab,质量高达太阳的33倍,直径则可装下20个太阳。

参宿二(猎户座ε星)是猎户腰带最中间的恒星,距我们2000光年,视星等为1.69,很明亮。参宿二是一颗B型蓝超巨星,质量为太阳的40倍,辐射量高达太阳的570,000。
猎户座δ星,参宿三,它的视星等为2.23,是这七颗恒星中最暗的一颗恒星,三星中最靠右的那颗,但是它的辐射量可不低,要知道,它是一颗和参宿一差不多的O型超巨星,它的光谱为O9.5Ia!它的质量为太阳的24.5倍,直径为太阳的16.5倍。
最后要介绍的是参宿六(κ星)了,它是猎户的左脚,在参宿七的左边,视星等为2.05等。参宿六是一颗B型蓝超巨星,它的质量为太阳的15倍,半径为太阳的22.5倍,可看出,它的氢耗尽了,已经有了很多的演化,再过几百万年,它将膨胀为红超巨星。
这就是猎户座的七颗亮星的简介,您明白了吗?
猎户座有很多恒星组成,其中亮星都有几十颗,每个恒星都相当于一个太阳,周围又会有很多行星、卫星等,所以是数不清楚的,而且远距离的行星很难观测到,因为行星不会发光。以目前的科技水平是搞不清楚的
地球就是地球,只有一颗。
地球是太阳系中的一颗行星,是太阳系八颗大行星之一。太阳系中叫“地球”的行星只有一颗,是唯一的一颗。
猎户座主体由参宿四和参宿七等4颗亮星组成一个大四边形。在四边形中央有3颗排成一直线的亮星。应该主要是这7颗星吧
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