The Shape of Galaxies Explained by new theoretical model
Galaxies come in three shapes – Spiral (2/3 rds of all galaxies), Elliptical (about 1/3rd of all galaxies) and Irregular (no well defined shape).
Scientists have used dark matter theory to predict the menagerie of galaxies found in the universe. Their new model reproduces 13 billion years’ worth of cosmic evolution, resulting in a surprisingly accurate tally of the different kinds of galaxies we see.
See more at: http://www.space.com/7767-mystery-galaxy-shapes-solved.html#sthash.jQpRxU2C.dpuf
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