John W. Campbell (solar physicist)

John W. Campbell was an American solar physicist known for his research on the Sun's magnetic activity and its influence on space weather and Earth's climate. His work involved studying solar flares, sunspots, and the solar cycle to better understand how solar phenomena impact Earth’s environment. Campbell contributed valuable insights into the Sun's behavior and the way solar activity interacts with Earth's atmosphere, ionosphere, and magnetosphere. His research has helped improve predictions of space weather events that can affect satellite communications, power grids, and navigation systems.