Five Things About Radiation Donuts (VIDEO) NASA/Goddard Space Flight Center This video is under embargo. Please login to access this video. Caption Earth is surrounded by giant, donut-shaped clouds of radiation. These are the Van Allen Belts. The wild particles trapped here can affect our technology and astronauts that pass through this region -- so we've sent twin spacecraft to study them. Here are five things to know! Watch on YouTube: https://www.youtube.com/watch?v=GNXsZEvhy9I Download in HD: https://svs.gsfc.nasa.gov/13148 Credit NASA's Goddard Space Flight Center Usage Restrictions None License Licensed content 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.