1. 日食：日食 eclipse of the Sun | 交食理论 eclipse theory | 食年;交点年 eclipse year
1. A solar eclipse occurs when the moon is caught between the sun and the earth while each of them moves along their fixed orbits.
2. An annular solar eclipse occurs when the moon slides across the sun, blocking all but a blazing halo of light.
3. Millions of people have witnessed a total eclipse of the sun as the moon cast its shadow from America through Europe and on to Asia.
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4. The width of the track of a central eclipse varies according to the relative apparent diameters of the Sun and Moon.
5. A solar eclipse occurs when the moon passes between the Earth and sun, totally or partially blocking the Earth's view of the sun.