Nasa's Pioneers are making their way past the Heliopause; the Heliopause is a balance point between the radiation pressue from the sun and that of the general interstellar radiation pressure of all the local and maybe more galactic stars combined. Reports are that there has been an increasse in cosmic rays detected(I forget which Pioneer; there's two; there's also two voyager spacecraft).
I'd like to think the Earth's magnetic field and atmosphere can protect life on Earth from even this increase of cosmic rays(which are protons, electrons; not just photons, or light). Still, one could wonder whether even this cavity formed from our own suns radiation pressure has created a vacuum that helps life develop on Earth? Well, maybe a little bit!