The Sun's magnetic field does not allow the density of the outside , to come into its system . Two things , how much does it let in and how much is reflected back into its self ? From the Sun . Is the Sun's Plasma refected back intowards the Sun ? Because of its magnetic field shield ? Is the Solar System in a bubble ; Created by the Sun's magnetic field? And does the cosmic radiation and plasma flow ( fluid dynamics ) over the magnetic field of the Sun ( outside the Sun's magnetic field ) ?