Tuesday, November 04, 2008


The Double Ring Galaxies of Arp 147

One has bright blue massive stars and the other older red ones. The universe is not only more wonderful than we imagine but it is more wonderful than we can imagine. This is a Hubble photo showing the result of a collision of galaxies. The stars rarely actually hit each other but, in the blue one a tidal force from the passage through in the interstellar dust and gas creates an outgrowing circle of new stars. What's going on in the red one is beyond my understanding.


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