Light is not Dark Matter

Could light or light photon's be the missing matter ( dark matter ) as it is everywhere incuding the vacuum of space between universes even.
- r winsor (age 50)
plymouth england

Your question is fundamental.  The answer is no, according to most astrophysicists.  One can observe the distribution of stars and galaxies and determine the basic constituents needed to duplicate the observed structure.  According to the best guesses, dark matter should consist of massive (so far undiscovered) particles. 
See 
for an informative discussion of the problem.

LeeH

(published on 10/26/2007)