I read an article in the Daily Telegraph, which says that the Sun's heliosphere is shrinking. Sun's heliosphere is a sort of a protective bubble created by the solar wind, which shields our solar system from harmful cosmic rays emanating from the interstellar space. The latest data suggests that the heliosphere has weakened by 25 percent in the past decade. The affects of this change is not entirely known, but continuing weakening of the heliosphere could affect the life on earth in a big way. NASA has launched IBEX (Interstellar Boundary Explorer) yesterday to study the interactions between solar wind and the cold vastness of space. Hopefully, we will learn more from the mission in the coming months.