11. These launchings provided information on the earth s radiation belt . 12. This belt of charged particles is now known as the Van Allen radiation belt . 13. Radiation belts present a significant hazard for spacecraft and potentially to human space travellers.14. His waves also helped explain the doughnut-shaped Van Allen radiation belts that encircle Earth. 15. Its tape recorder failed, making it unable to measure the Van Allen radiation belts . 16. The Van Allen radiation belt lies within the geospace. 17. Transit 4A, launched June 29, 1961, was the first satellite to use a radiation belt . 18. A particular concern was raised regarding false claims in the article Van Allen radiation belt . 19. No magnetic field or Martian radiation belts were detected. 20. Some of the energetic particles are trapped near the equator of Ganymede, creating mini-radiation belts .
