For a total solar eclipse to take place, the moon passes between the sun and Earth, completely blocking the face of the sun. Weather permitting, people located in the center of the moon’s shadow when it hits Earth will experience a total eclipse. The sky will become very dark for a few minutes, as if it were night. Normally, when looking at the sun, you can only see the photosphere, the bright surface.
However, extending about 5,000 km above the photosphere is the region of the solar atmosphere called the chromosphere. It is only seen during total solar eclipses, or with sophisticated telescopes, and its red and pinkish color gives the blackened moon a thin halo of color against the greyish corona. People in the path of a total solar eclipse can also see the sun’s corona, the outer atmosphere, which is otherwise usually obscured by the bright face of the sun. A total solar eclipse is the only type of solar eclipse where viewers can briefly remove their eclipse glasses, during the few moments when the moon is completely blocking the sun.