动画：英仙座流星雨
(原标题: Animation: Perseid Meteor Shower)
2024-08-11
浏览次数: 13
英仙座流星雨来自哪里？英仙座流星体大多是小块的石砾，它们曾经被斯威夫特-塔特尔彗星排出，并随着这颗彗星的轨道慢慢消散。这幅特色动画描绘了整个流星体绕太阳运行的过程。当地球靠近这条流星雨时，每年都会发生英仙座流星雨。在动画中高亮显示，这种大小的彗星碎片通常非常暗淡，几乎无法检测到。这些碎片中只有一小部分会进入地球大气层，升温并明亮地分解。今晚和接下来的几个晚上将会有更好的天空可以看到英仙座流星雨和其他活跃的流星雨，因为从午夜开始，第一个四分之一的月亮将从天空中消失。你的天空惊喜：APOD在你的生日上展示了什么照片？(1995后)
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Where do Perseid meteors come from? Mostly small bits of stony grit, Perseid meteoroids were once expelled from Comet Swift-Tuttle and continue to follow this comet's orbit as they slowly disperse. The featured animation depicts the entire meteoroid stream as it orbits our Sun. When the Earth nears this stream, as it does every year, the Perseid Meteor Shower occurs. Highlighted as bright in the animation, comet debris this size is usually so dim it is practically undetectable. Only a small fraction of this debris will enter the Earth's atmosphere, heat up and disintegrate brightly. Tonight and the next few nights promise some of the better skies to view the Perseid shower as well as other active showers because the first quarter moon will be absent from the sky from midnight onward. Your Sky Surprise: What picture did APOD feature on your birthday? (post 1995)