How many Explorer satellites did Van Allen contribute to?
One
Two
Three
Four
Answer
Van Allen contributed to two Explorer satellites. Explorer 1 was launched on January 31, 1958, and was the first spacecraft to orbit Earth. Explorer 1 carried instruments that detected the Van Allen radiation belts, which are regions of charged particles trapped by Earth's magnetic field. Explorer 3 was launched on March 26, 1958, and also carried instruments that detected the Van Allen radiation belts.
Exploring the Outer Limits: The James Van Allen Quiz
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