For decades, solar physicists have been trying to figure out why the sun’s atmosphere is so much hotter than its surface. Soon we will finally get an answer as NASA prepares to launch a spaceship that will travel within 4 million miles of the sun’s surface—much closer than any spacecraft that has come before it. If you want to see it happen, follow this link.
NASA is shooting a spaceship at the sun to solve this decades-old mystery
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