为什么会有月食出现

给你月食形成的详细资料,祝你好http://baike.baidu.com/view/5679.htm运!

因为这时候太阳和月亮还有地球在一条直线上。
紫外线很强的，会的白内障的

地球在日月之间

Lunar eclipse

Main article: Lunar eclipse

The progression of a lunar eclipse. Totality is shown with the last two images to lower right. These required a longer exposure time to make the details visible.
The progression of a lunar eclipse. Totality is shown with the last two images to lower right. These required a longer exposure time to make the details visible.

Lunar eclipses occur when the Moon passes through the Earth's shadow. Since this occurs only when the Moon is on the far side of the Earth from the Sun, lunar eclipses only occur when there is a full moon. Unlike a solar eclipse, an eclipse of the Moon can be observed from nearly an entire hemisphere. For this reason it is much more common to observe a lunar eclipse from