Either the moon or the planet Mercury was passing across the sun's disk.

越过太阳表面的，可能是月亮或是水星。

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During a total eclipse, the Sun's disk is completely occulted by the Moon.

在日全食期间，太阳将被月球完全覆盖。

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If the moon completely covers over the sun's disk, it's a total solar eclipse.

当月球完全挡住太阳圆盘的时候，就会发生日全食。

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People in a much larger region of the world can anticipate seeing a partial solar eclipse, in which the moon blocks only a fraction of the sun's disk.

CNN: Africa awaits total eclipse of the sun

If our solar system's disk wasn't ionized, its material would not have been funneled onto the young sun's surface, researchers said.

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