流星和银河系
(原标题: The Meteor and the Galaxy)
2023-08-23
浏览次数: 16
它来自外太空。它——在这种情况下是彗星核的沙粒大小——可能是许多年前从绕太阳运行的斯威夫特-塔特尔彗星上喷射出来的，但随后继续独自绕太阳运行。当地球穿过这个轨道时，这片彗星碎片撞击了我们美丽星球的大气层，被视为流星。这颗流星变质了，导致气体释放出来，这些气体在其组成元素发出的颜色中发光。这张特色图片是上周英仙座流星雨的高峰期在西班牙的卡斯蒂利亚-拉曼查拍摄的。这条风景如画的流星条纹碰巧出现在50张照片中唯一包含仙女座星系的一张照片中。星星点缀着画面，每一颗都比流星远得多。与恒星相比，仙女座星系（M31）又远得多。
查看原文解释
It came from outer space. It -- in this case a sand-sized bit of a comet nucleus -- was likely ejected many years ago from Sun-orbiting Comet Swift-Tuttle, but then continued to orbit the Sun alone. When the Earth crossed through this orbit, the piece of comet debris impacted the atmosphere of our fair planet and was seen as a meteor. This meteor deteriorated, causing gases to be emitted that glowed in colors emitted by its component elements. The featured image was taken last week from Castilla La Mancha, Spain, during the peak night of the Perseids meteor shower. The picturesque meteor streak happened to appear in the only one of 50 frames that also included the Andromeda galaxy. Stars dot the frame, each much further away than the meteor. Compared to the stars, the Andromeda galaxy (M31) is, again, much further away.
© Jose Pedrero