地球和月亮与太阳处在一条直线上，日食就发生了。
An eclipse happens when the earth and moon are in line with the sun.
阿利斯塔克从他的计算中认识到，太阳比地球和其他行星要大得多。
Aristarchus recognized from his calculations that the Sun was much larger than the Earth and other planets.
这两枚欧洲宇航局建造的卫星将探测太阳和地球之间如何进行相互作用。
The satellites, built by the European Space Agency (ESA), will look at interaction between the sun and the Earth.
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