美国有线新闻 CNN 一年一度的天琴座流星雨降临（在线收听）

Which of these meteor showers is typically visible in April? Lyrids, Bootids, Perseids, or Ursids? The meteor shower that gets its name from the constellation Lyra occurs in April.

下列哪种流星雨在四月比较常见？天琴座流星雨、牧夫座流星雨、英仙座流星雨还是小熊座流星雨？以天琴座命名的流星雨出现在四月。

And scientists say that's because the Lyrids appear to originate from near that constellation. But don't just take their word for it. On Tuesday and especially Wednesday night, you can see the Lyrids for yourself if the weather's clear. It's the first meteor shower of Spring. The American Meteor Society says the best time for viewing it will probably be between midnight and 5 a.m. But if that's too late or too early for you, astronomers say some slower longer meteors will streak over our heads in the hours before midnight. Here's why this is happening. There's a comet named Thatcher. It leaves a trail of debris behind it as it rockets through space. The Earth passes through that debris in April. And the shooting stars that are really Thatcher's meteors burn up in our atmosphere.

科学家表示，这是因为天琴座流星雨似乎起源于该星座附近。但不要听信他们的话。如果天气晴朗，星期二，尤其是星期三，人们可以自已观看天琴座流星雨。这是春天的第一场流星雨。美国流星协会表示，观赏流星雨的最佳时间为午夜至凌晨5点之间。但天文学家表示，如果这个时间段对你来说太晚或太早，午夜前的几个小时，可能会有一些速度较慢、时间较长的流星掠过我们的头顶。下面来解释一下发生天琴座流星雨的原因。有一颗名为“佘契尔”的彗星。它在太空中迅速移动时，在身后留下了一串碎片。地球在四月时会穿过这些碎片。这一流星雨实际上是佘契尔彗星的碎片在大气层中燃烧。