Am 18.12.2015 um 01:30 schrieb Alain:

> Maybe that so called "dark matter" is realy just a huge quantity of free
> neutrons.
> After all, "dark matter" is regarded as been non interacting with light,
> having a mass, and only interact with normal matter gravitationaly. The
> neutron nicely fit the bill.

Not really. According to the pretty well-tested Standard Model of
particle physics, free neutrons in deep space would readily undergo
beta(-) decay into hydrogen and electron neutrinos within a matter of a
quarter of an hour on average.

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