An invisible shield has been discovered 7,200 miles above Earth . The discovery of this barrier in the Van Allen radiation belts suggests a new explanation for how `` killer electrons '' are held at bay . The shield blocks what are known as the solar wind, which is charged particles that stream out from our sun and can cause space weather on Earth.
An invisible shield has been discovered 7,200 miles above Earth . The shield blocks what are known as the solar wind, which is charged particles that stream out from our sun and can cause space weather on Earth.