How’s the weather up there?

The volatile surface of the sun is responsible for “space weather” that can affect Earth. Our atmosphere and magnetic field protect what’s below it from almost all such events, so solar weather went unnoticed until the 1859. However, humans and their technology did not stay on the ground, making us increasingly vulnerable to the unpredictabilities of the sun.

Source: NASA | Graphic by Bonnie Berkowitz and Alberto Cuadra—The Washington Post June 21, 2011
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