Fat or flat: Getting galaxies into shape

Astronomers have discovered what makes some spiral galaxies fat and bulging while others are flat discs — and it’s all about how fast they spin. The researchers found that fast-rotating spiral galaxies are flat and thin while equally sized galaxies that rotate slowly are fatter. One of the researchers said the way galaxies are formed looks a bit similar to a carousel made of an elastic disc.

from Space & Time News — ScienceDaily http://ift.tt/OKQ7Fy

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