A NASA spacecraft is about to make the closest approach to the sun.
The Parker Solar Probe was launched in 2018 to get a close-up look at the sun. Since then, it has flown straight through the sun's corona: the outer atmosphere visible during a total solar eclipse.The next milestone: closest approach to the sun. Plans call for Parker on Tuesday to hurtle through the sizzling solar atmosphere and pass within a record-breaking 3.8 million miles of the sun's surface.
Parker planned to get more than seven times closer to the sun than previous spacecraft, hitting 430,000 mph at closest approach. It's the fastest spacecraft ever built and is outfitted with a heat shield that can withstand scorching temperatures up to 2,500 degrees Fahrenheit . The sun's warming rays make life possible on Earth. But severe solar storms can temporarily scramble radio communications and disrupt power.
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