As the Moon blocked just the central portion of the Sun, people looking skyward would have seen a fiery ring around the Moon's perimeter, what is known as an annular eclipse.

当月亮正好阻挡住太阳中心的一部分，人们会看太阳像燃烧的圆环环绕在月球的周边，这就是日环食。

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During Sunday's total solar eclipse, the moon covered the sun over Easter Island, so that only the faint, white ring of the sun's upper atmosphere, or corona, was visible.

周日发生在复活节岛上的日全食，月亮将太阳覆盖了起来，只有太阳上层大气所形成的一圈微弱的白色圆环或称日冕处于可见状态。

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Titan looms just over the thin rings, while dark ring shadows on Saturn show the Sun to be above the ring plane.

靠近中的土卫六(泰坦)正处于纤细的光环上方。而投在土星表面的光环阴影表明，太阳正位于光环平面的上方。

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The actual annular portion, in which the sun appears as a thin ring, will be about four minutes long, Newmark said.

CNN: Upcoming solar eclipse to project 'ring of fire'

"For the May eclipse, the moon will be at the furthest distance from Earth that it ever achieves -- meaning that it will block the smallest possible portion of the sun, and leave the largest possible bright ring around the outside, " the agency said on its website.

CNN: Upcoming solar eclipse to project 'ring of fire'

During his 32nd solar eclipse observation, the Harvard-trained astronomer is to study the elusive coronal ring, the outer atmosphere of the sun, which can only be seen when the moon blots out the solar disk.

CNN: Africa awaits total eclipse of the sun