NASAのインスタグラム(nasa) - 11月23日 01時53分

Young Elliptical Galaxy: At the center of this amazing image is an elliptical galaxy. Surrounding the galaxy and visible in the background are a wealth of other galaxies of all shapes. The reason for the peculiar shape of this galaxy stems from its formation history. When galaxies form, they usually resemble our galaxy, the Milky Way, with flat disks and spiral arms where star formation rates are high and which are therefore very bright. An elliptical galaxy is a much more disordered object which results from the merging of two or more disk galaxies. During these violent mergers most of the internal structure of the original galaxies is destroyed. The fact that NGC 3610 still shows some structure in the form of a bright disk implies that it formed only a short time ago. The galaxy's age has been put at around four billion years and it is an important object for studying the early stages of evolution in elliptical galaxies.

Image credit: ESA/Hubble & NASA, Acknowledgement: Judy Schmidt
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