. . . they are there; but, we don't know why. http://www.zpenergy.com/modules.php?name=News&file=article&sid=1946
Space is fizzing. Above our heads, where the Earth?s magnetic field meets the constant stream of gas from the Sun, thousands of bubbles of superheated gas are constantly growing and popping. Their discovery could allow scientists to finally understand the interaction between the solar wind and the Earth?s magnetic field.