Why Can We See the Corona Sphere During a Solar Eclipse?

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    Corona Sphere
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The corona sphere is visible during a solar eclipse because the moon blocks the sun's bright light, allowing the faint corona to stand out against the darkened sky. The blue sky typically washes out the corona, making it invisible under normal conditions. A dark sky is essential for observing the corona, which is why an eclipse is necessary. Additionally, devices like coronascopes can simulate the effect of an eclipse by blocking sunlight to reveal the corona. Understanding these principles highlights the unique conditions required to observe this solar phenomenon.
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In basic, why can we only see the corona sphere during a solar eclipse? Is there a property to the eclipse or sun that causes this?
 
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There is a device called a coronascope that is useful for this purpose.
 

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