Given the task definition and input, reply with output. In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

This body's differential rotation combines with magneto-hydro-dynamic effects to form a magnetic field known as the Parker spiral. Thermal columns in the convection zone cause the granulation of this body. The discovery of flavor oscillation resolved this body's namesake "neutrino problem. " "Bow shock" is the phenomenon in which the flow of plasma from this body is interrupted by a planetary magnetic field. It creates its namesake "wind" as its corona expands into space. For 10 points, name this star that is one astronomical unit away from Earth.
Science