Freefall in color by many folks.
Florence: When it comes to cosmic rays, our primary shielding is solar wind. Plasma ejected by the sun.
Florence: The heliosphere blocks about 70 to 90 percent of the cosmic rays from getting to us.
Descriptions: Bow Shock, Sun, Termination Shock, Heliosphere (Not very spherical)
Florence: It's another case where empty space isn't quite empty, and when you have billions of kilometers of not quite empty, it adds up.