室女星系团的核心

2022年6月15日

In the Heart of the Virgo Cluster
Image Credit & Copyright: Saulius Adomaitis

Explanation: The Virgo Cluster of Galaxies is the closest cluster of galaxies to our Milky Way Galaxy. The Virgo Cluster is so close that it spans more than 5 degrees on the sky – about 10 times the angle made by a full Moon. With its heart lying about 70 million light years distant, the Virgo Cluster is the nearest cluster of galaxies, contains over 2,000 galaxies, and has a noticeable gravitational pull on the galaxies of the Local Group of Galaxies surrounding our Milky Way Galaxy. The cluster contains not only galaxies filled with stars but also gas so hot it glows in X-rays. Motions of galaxies in and around clusters indicate that they contain more dark matter than any visible matter we can see. Pictured here, the heart of the Virgo Cluster includes bright Messier galaxies such as Markarian’s Eyes on the upper left, M86 just to the upper right of center, M84 on the far right, as well as spiral galaxy NGC 4388 at the bottom right.

Celestial Surprise: What picture did APOD feature on your birthday? (post 1995)

Birthday? Tomorrow’s picture: open space

室女星系团的核心
影像提供与版权: Saulius Adomaitis

说明: 室女星系团是离我们银河系最近的星系团。而室女星系团是如此的密近，以致于它在天空绵延了超过5度（约为满月的10倍）的天区。中心离我们约7千万光年远的室女星系团，除了是最邻近我们的星系团之外，其内更拥有超过2,000个成员星系，并对包括银河系在内的本星系群成员有显著的重力牵引。室女星系团之内，除了有挤满恒星的星系之外，也有温度高到会发出X射线辐射的气体。星系团里和周围的星系之运动显示，此星系团所含的暗物质总量多于可见物质。上图所呈现的室女星系团核心区，拥有许多明亮的梅西叶星系，诸如左上角的马卡莱恩之眼、中右上方的M86、右缘的M84、以及右下方的螺旋星系NGC 4388。

天赐惊喜: APOD在你生日那天拍了什么照片？（1995年后）

明日的图片: open space