Magnetic reconnection (IMAGE) NASA/Goddard Space Flight Center Caption Magnetic reconnection is a process that occurs in plasma, sometimes called the fourth state of matter. Plasma forms when a gas has been energized enough to break apart its atoms, leaving a motley of negatively charged electrons and positively charged ions existing side-by-side. This energetic, fluid-like material is exquisitely sensitive to magnetic fields. Credit NASA Usage Restrictions No restrictions. License Public Domain Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.