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转自NASA
本人随手简略翻翻，不准请原谅~~
神奇的环状星系~~
这张图是哈勃2001年7月拍的，天文学家Hoag首先提出这个问题：这是一个星系，还是两个？
类似的星系后来也发现了些，她现在被认为是环状星系的一种，有一种猜想是说这种星系在billions（几十亿）年前遭遇了一次撞击，然后靠外的部分所受来自星系中心部分的引力的效应消失了。（Genesis hypotheses include a galaxy collision billions of years ago and the gravitational effect of a central bar that has since vanished. 这句的翻译不太确定，如果有牛人要帮帮我呀~~）
有趣的是，一点附近还有一个星系~他应该更远~
A Strange Ring Galaxy
Is this one galaxy or two? Astronomer Art Hoag first asked this question when he chanced upon this unusual extragalactic object. On the outside is a ring dominated by bright blue stars, while near the center lies a ball of much redder stars that are likely much older. Between the two is a gap that appears almost completely dark. How Hoag's Object formed remains unknown, although similar objects have been identified and collectively labeled as a form of ring galaxy. Genesis hypotheses include a galaxy collision billions of years ago and the gravitational effect of a central bar that has since vanished.
This image, taken by the Hubble Space Telescope in July 2001, reveals unprecedented details of Hoag's Object and may yield a better understanding. Hoag's Object spans about 100,000 light years and lies about 600 million light years away toward the constellation of the Snake (Serpens). Coincidentally, visible in the gap (at about one o'clock) is yet another ring galaxy that likely lies far in the distance. |
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IP卡
狗仔卡
提升卡
置顶卡
沉默卡
喧嚣卡
显身卡
顶顶顶顶顶顶顶顶顶顶顶顶顶
