The above picture shows the large heliosphere (in fading yellow) surrounding the small yellow sun from which the solar wind moves outward
and opposes the galactic cosmic rays entering the heliosphere and earth's atmosphere. The galactic rays provide a source of nuclei, charged particles, for moisture droplets to build upon and thus contribute to the earths low cloud
cover. This 11 year oscillation cycle, caused by the interaction of the solar flares against the galactice/cosmic rays as shown in the charts below, is a major controlling factor of the variation of the earths climate.