室女座星系团的中心
说明：室女座星系团是距离我们银河系最近的星系团。室女座星系团距离我们如此之近，以至于它在天空中覆盖了5度多的天区――大小约是满月的10倍。而它的中心位于距离我们大约7,000万光年的地方，作为距离我们最近的星系团，室女座星系团内包含超过2,000个星系，而且与我们银河系周围的本地星系团之间产生了显著的引力作用。星系团包含的不仅仅只是富含恒星的星系团，还包括发出x射线的炽热气体。星系团内星系的运动表明那里的暗物质比我们看到的可见物质要多。上面影像拍摄得是室女座星系团的中心，包括明亮的梅西耶星系，比如左上方的马卡林之眼，影像中央右上方的M86，最右边的M84，还有影像右侧底部的旋涡星系NGC4388。
In the Heart of the Virgo Cluster
Credit & Copyright: Günter Kerschhuber (Gahberg Observatory)
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 above, 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.
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置顶卡
变色卡
千斤顶
显身卡
