WHAT a sea of magnetic bubbles would be I really cannot picture, but the old conceptions of this area of the solar system (the boundary between the sun's effect and the rest of the universe,) are being revised, on the basis of data sent back from the Voyager spacecrafts. Computer simulations of what would produce the observed effects suggest "the edge of the solar system (the heliosheath) is not smooth, but filled with a turbulent sea of magnetic bubbles." This is discussed briefly at a Nasa notice which also pointed out "the picture of this previously unexplored region...[is] critical for understanding how cosmic rays are created and reach near-Earth space... Galactic cosmic rays are of concern for human space travel, in particular during the quiet periods called the solar minimum."
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