Galaxy mix: No dark matter required

Dark matter may not matter in forming dwarf galaxies

1:09pm, February 18, 2009

Darth Vaders of astronomy, step aside. Purveyors of theories of dark matter — the invisible, as-yet-undetected material supposedly needed for galaxy formation — have a seat. Astronomers say they have found evidence that the gravitational collapse of visible, swirling gas may suffice to make some dwarf galaxies.

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