英仙座来自英仙座
(原标题: Perseids from Perseus)
2025-08-12
浏览次数: 1485
这些流星都是从哪里来的？就天空的方向而言，准确的答案是英仙座。这就是为什么今晚的流星雨被称为英仙座流星雨——流星似乎都来自英仙座的辐射源。不过，就母体而言，构成英仙座流星雨的沙粒大小的碎片来自斯威夫特-塔特尔彗星。这颗彗星沿着一条明确的轨道围绕太阳运行，接近地球的轨道部分重叠在英仙座的前面。因此，当地球穿过这个轨道时，掉落碎片的辐射点出现在英仙座。这张合成照片是在六个晚上拍摄的，包含了2024年8月英仙座流星雨中的100多颗流星，显示了许多明亮的流星在波兰的比什扎迪山脉上划过。今年的英仙座流星雨，通常是一年中最好的流星雨之一，将与一个明亮的月亮竞争，在许多地方，太阳落山后不久就会升起。
查看原文解释
Where are all of these meteors coming from? In terms of direction on the sky, the pointed answer is the constellation of Perseus. That is why the meteor shower that peaks tonight is known as the Perseids -- the meteors all appear to come from a radiant toward Perseus. In terms of parent body, though, the sand-sized debris that makes up the Perseids meteors come from Comet Swift-Tuttle. The comet follows a well-defined orbit around our Sun, and the part of the orbit that approaches Earth is superposed in front of Perseus. Therefore, when Earth crosses this orbit, the radiant point of falling debris appears in Perseus. Featured here, a composite image taken over six nights and containing over 100 meteors from 2024 August Perseids meteor shower shows many bright meteors that streaked over the Bieszczady Mountains in Poland. This year's Perseids, usually one of the best meteor showers of the year, will compete with a bright moon that will rise, for many locations, soon after sunset.
© Marcin Rosadziński