On Fri, Feb 2, 2018 at 6:21 PM, <mix...@bigpond.com> wrote:

So now, you have either proven that photons do contribute to gravitational
> mass,
> or that particles never enter a black hole. :)

Suppose for the sake of argument that photons carry mass in a very
delocalized way.  Would there be enough of this mass to account for the
experimental observations that heave lead astrophysicists to search for
dark matter?


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