参宿七大
(原标题: Rigel Wide)
2023-04-07
浏览次数: 17
明亮，蓝色，超巨星参宿七标志着猎户座猎人在地球的夜晚的脚。它被命名为猎户座β星，位于这张深而宽的视野的中心。参宿七的蓝色表明它比它在猎户座的竞争对手——淡黄色的参宿四（猎户座阿尔法星）要热得多，尽管这两颗恒星都足够大，最终会以核心坍缩超新星的形式结束它们的生命。大约860光年之外，参宿七也比太阳热，其半径约为太阳半径的74倍。这大约是水星轨道的大小。在朝向星云丰富的星座的10度宽框架中，猎户座星云位于左上方。在参宿七的右边，被它明亮的蓝色星光照亮的是尘封的女巫头星云。参宿七是一个多恒星系统的一部分，尽管它的伴星要暗淡得多。
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Brilliant, blue, supergiant star Rigel marks the foot of Orion the Hunter in planet Earth's night. Designated Beta Orionis, it's at the center of this remarkably deep and wide field of view. Rigel's blue color indicates that it is much hotter than its rival supergiant in Orion the yellowish Betelgeuse (Alpha Orionis), though both stars are massive enough to eventually end their days as core collapse supernovae. Some 860 light-years away, Rigel is hotter than the Sun too and extends to about 74 times the solar radius. That's about the size of the orbit of Mercury. In the 10 degree wide frame toward the nebula rich constellation, the Orion Nebula is at the upper left. To the right of Rigel and illuminated by its brilliant blue starlight lies the dusty Witch Head Nebula. Rigel is part of a multiple star system, though its companion stars are much fainter.
© Rheinhold Wittich