美国国家航空航天局NASA每日一图(天文)-2017年7月10日

2017 July 10

Spiral Galaxy NGC 1512: The Nuclear Ring
Image Credit: NASA, ESA, Hubble, LEGUS; Acknowledgement: Judy Schmidt
Explanation: What's happening around the center of this spiral galaxy? Seen in total, NGC 1512 appears to be a barred spiral galaxy -- a type of spiral that has a straight bar of stars across its center. This bar crosses an outer ring, though, a ring not seen as it surrounds the pictured region. Featured in this Hubble Space Telescope image is an inner ring -- one that itself surrounds the nucleus of the spiral. The two rings are connected not only by a bar of bright stars but by dark lanes of dust. Inside of this inner ring, dust continues to spiral right into the very center -- possibly the location of a large black hole. The rings are bright with newly formed stars which may have been triggered by the collision of NGC 1512 with its galactic neighbor, NGC 1510.

2017年7月10日

螺旋星系NGC 1512:核环
图片来源:NASA,欧空局,哈勃,LEGUS; 致谢:Judy Schmidt
说明:这个螺旋星系的中心周围发生了什么? 看来,NGC 1512似乎是一个禁止的螺旋星系 - 一种螺旋形,在其中心有一条直线的星星。 这个酒吧穿过一个外环,但是环绕着被描绘的区域看不到一个环。 这个哈勃太空望远镜的特征是一个内环,它环绕着螺旋的核心。 这两个戒指不仅由一条明亮的星星连接,而且还连接着黑暗的尘土通道。 在这个内圈的内部,灰尘继续螺旋直到中心 - 可能是一个大黑洞的位置。 由于NGC 1512与其星系邻居NGC 1510的碰撞可能触发了新形成的星星,这些戒指是明亮的。

 

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