CNN News:一年一度的天琴座流星雨降临

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.

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.