  The information capacity of the universe has been a topic of great debate
since 1970s, and continues to stimulate multiple branches of physics research.
Here we used Shannon's information theory to estimate the amount of encoded
information in all the visible matter in the universe. We achieved this by
deriving a detailed formula estimating the total number of particles in the
observable universe, known as the Eddington number, and by estimating the
amount of information stored by each particle about itself. We determined that
each particle in the observable universe contains 1.509 bits of information and
there are 6 * 10 to power 80 bits of information stored in all the matter
particles of the observable universe.
