SMRTR Science & EngineeringMar 25, 2026Scientific American

Earth’s magnetic field may be more powerful than we thought

SMRTR summary

China's Chang'e 4 lunar lander discovered that Earth's magnetic field extends much farther into space than previously believed, creating a protective "cavity" that shields even the moon from dangerous galactic cosmic rays. This surprising finding could help NASA plan safer lunar missions by allowing astronauts to schedule activities during periods when the moon remains within Earth's magnetic protection.

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