Hubble views a young elliptical galaxy

November 23, 2015 by Ashley Morrow
Credit: ESA/Hubble & NASA, Acknowledgement: Judy Schmidt 

At the center of this amazing Hubble image is the elliptical galaxy NGC 3610. Surrounding the galaxy are a wealth of other galaxies of all shapes. There are spiral galaxies, galaxies with a bar in their central regions, distorted galaxies and elliptical galaxies, all visible in the background. In fact, almost every bright dot in this image is a galaxy—the few foreground stars are clearly distinguishable due to the diffraction spikes (lines radiating from bright light sources in reflecting telescope images) that overlay their images.

NGC 3610 is of course the most prominent object in this image—and a very interesting one at that! Discovered in 1793 by William Herschel, it was later found that this contains a disk. This is very unusual, as disks are one of the main distinguishing features of a . And the disk in NGC 3610 is remarkably bright.

The reason for the peculiar shape of NGC 3610 stems from its formation history. When galaxies form, they usually resemble our galaxy, the Milky Way, with flat disks and 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.

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NIPSZX
5 / 5 (2) Nov 24, 2015
I wonder if humans will be around long enough to document the changes in the evolution.
geokstr
5 / 5 (1) Nov 25, 2015
That depends on your definition of "human", doesn't it? At the current pace of research into DNA modification, nanotechnology and cybernetics, we may be a new compound species far faster than the normal rate of evolution would take us in the relatively near future. And because we'll be in control of the process, we won't be constrained by the environment or random mutation in determining either the direction or the end result of our evolution.

This always assumes that neither we nor the many natural apocalypses out there will exterminate homo sapiens sapiens first.

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