Ground-based telescope detects star's corona | Science News

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Ground-based telescope detects star's corona

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10:24am, August 1, 2001

When the moon eclipses the sun, it unmasks a glorious halo–the glowing gases in the sun's outer atmosphere, or corona. Six decades ago, observations in visible light revealed that the corona has a temperature greater than 1 million kelvins, making it hundreds of times hotter than the sun's surface.

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