西枢 HJ26184
拒绝借救助之名买卖、猎捕野生动物,反对野鸟宠物化。
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20220816的APOD:突尼斯上空的流星雨 --附带翻译 作者是: Makrem Larnaout 下面是960*960和2048*2048的缩略图链接,因为担心版权问题所以只传链接。 在链接最后加上 .jpg: http://tieba.baidu.com/mo/q/checkurl?url=https%3A%2F%2Fapod.nasa.gov%2Fapod%2Fimage%2F2208%2FMeteorWind_Larnaout_960&urlrefer=c1abbdc96cca3be7e80b9d07aca86c0f http://tieba.baidu.com/mo/q/checkurl?url=https%3A%2F%2Fapod.nasa.gov%2Fapod%2Fimage%2F2208%2FMeteorWind_Larnaout_2048&urlrefer=f855ab84472dd47da9321f1f9fa4f22d Explanation: Does the Earth ever pass through a wind of meteors? Yes, and they are frequently visible as meteor showers. Almost all meteors are sand-sized debris that escaped from a Sun-orbiting comet or asteroid, debris that continues in an elongated orbit around the Sun. Circling the same Sun, our Earth can move through an orbiting debris stream, where it can appear, over time, as a meteor wind. The meteors that light up in Earth's atmosphere, however, are usually destroyed. Their streaks, though, can all be traced back to a single point on the sky called the radiant. The featured image composite was taken over two days in late July near the ancient Berber village Zriba El Alia in Tunisia, during the peak of the Southern Delta Aquariids meteor shower. The radiant is to the right of the image. A few days ago our Earth experienced the peak of a more famous meteor wind -- the Perseids. 解释:地球是否曾穿过流星的风?是的,并且经常以流星雨的方式显现。几乎所有的流星都是从环绕太阳运行的彗星或小行星上逃逸出来的沙子大小的碎片。这些碎片继续在环绕太阳的细长轨道上运行。因为环绕着同一个太阳,地球能穿过轨道上的碎片流,随着时间推移,它将以流星雨的形式出现。然而在地球大气层中闪耀发光的流星通常都毁灭了,不过能追踪到它们的轨迹都从天空中同一点散发出来,这一点叫做辐射点。这张精选的合成图片是在七月下旬花了超过两天时间拍摄的,拍摄地点在突尼斯的一个叫Zriba El Alia的古老的柏柏尔人村庄附近。此时正值宝瓶座δ南流星雨的峰值时期。辐射点在图像右侧。在几天前,我们的地球经历了一个更出名的流星雨的峰值期——英仙座流星雨。
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