The Industrial Revolution for Galaxies (Part 1) – The Catholic Astronomer

When one looks at a deep image of the distant universe using the Hubble Space Telescope, a myriad of galaxies fill the field of view. Some galaxies sport elegant spiral shapes, others take on giant 3D oval (ellipsoidal) shapes, and still other have no discernible shape at all. On small scales galaxies appear to be put down haphazardly with all possible orientations and distances away from us. It is only when one takes a step back to view this panoply of objects thousands or even millions at a time, that we see that the arrangement is far from random. On larger scales, galaxies form a kind of 3D spider web which we call the “cosmic web.” These objects with 10 billion stars each have a tendency to collect at the junctures or “nodes” of the cosmic web. These galaxies that “grow up in the city” are seen to have a very different course of evolution compared to those that reside … Continue reading →

Sorgente: The Industrial Revolution for Galaxies (Part 1) – The Catholic Astronomer

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