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.
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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.
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.