【天文】 球状星团。
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Below and to Antares' right is the globular cluster Messier 4.
在心宿二右下方是球状星团M4。
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Globular cluster 47 Tuc is also home to exotic X-ray binary star systems.
球状星团47 Tuc中也存在一些奇怪的紫外双星系统。
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NANCY GRACE ROMAN: "I think the image that to me was most striking was the center of a globular cluster."
罗曼:“我觉得那张图片最让我印象深刻的是球状星团的中心。”
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The image shows both old stars and youngstars, a galactic globular cluster and emission from dust in our owngalaxy
图像既显示了老星,也显示了新星,还显示了一个星系的球状星团和我们自己星系尘埃的辐射。
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The bright white object just to the left of the SMC is a globular cluster of stars in the Milky Way known as 47 Tucana.
小麦哲伦云的左边,明亮的白色物体,是银河系内一个球状星团,被称作杜鹃47。
球状星团由成千上万,甚至几十万颗恒星组成,外貌呈球形,越往中心恒星越密集。球状星团里的恒星平均密度比太阳周围的恒星密度高几十倍而它的中心附近则要大数万倍。球状星团通常由数十万颗的低金属含量的老年恒星组成,