The Suns Magnetic Field
The Sun produces electric currents that spread throughout the solar system. The electric current is the reason the surface of the Sun, surging and ebbing regularly. When the Sun's electric current peaks, the polarity of the field flip.
Earth's star has two poles like a bar magnet. The poles become opposites at the peak of solar activity every eleven years.
The Sun is not a perfect sphere rathe, fluid meaning the surface moves at different speeds depending on latitude; this causes the magnetic field lines to get wound up. When the winding becomes extreme the magnetic field lines break producing solar flares.
The Sun's magnetic field influences past the solar system and into interstellar space.