2018年08月17日:英仙座火流星与久现流星遗迹-(Perseid Fireball and Persistent Train)

2018年08月17日:英仙座火流星与久现流星遗迹-(Perseid Fireball and Persistent Train)

admin
2018-08-17 / 0 评论 / 0 阅读 / 正在检测是否收录...

2018年08月17日:英仙座火流星与久现流星遗迹-(Perseid Fireball and Persistent Train)
2018年08月17日:英仙座火流星与久现流星遗迹-(Perseid Fireball and Persistent Train)--原图下载


Image Credit &Copyright:Petr Horálek
说明: 在8月12日当地子夜之前,这颗极端明亮的英仙座流星,闪现在地球.斯洛伐克.波隆尼黑暗天空公园的上空。这颗从夏季银河旁边掠过 的流星,刚开始的色泽,可能是源自这群流星雨流星特有的高运动速率。以大约每秒60公里高速移动的英仙座流星,在通过地球高层大气时,会激发出氧原子的绿光辐射。另一个明亮流星的特徵是:这颗英仙座流星留下了名为“久现流星遗迹”的流星痕,在高空大气中飘流。影像这些保留原始影像尺度、拍摄时间相隔1分钟的嵌图,呈现了它的演化过程。相较于流星短暂的亮闪,这些幽灵般的流星遗迹真的是绵延许久。过了一小时,这个暗淡的流星遗迹依然可辨,而且已扩张成涵盖超过80度天空的庞然巨物。

原文:

Image Credit &Copyright:Petr Horálek
Explanation: Before localmidnight on August 12, this brilliant Perseid meteorflashed above the Poloniny Dark Sky Park, Slovakia, planet Earth.Streakingbeside the summer Milky Way, its initial color is likely dueto the shower meteor's characteristically high speed.Moving at about 60 kilometers per second, Perseid meteors canexcite green emission from oxygen atoms while passing through thethin atmosphere at high altitudes.Also characteristic of bright meteors, this Perseid left alingering visible trail known as apersistent train, wafting in the upperatmosphere.Its development is followed in the inset frames, exposures separatedby one minute and shown at the scale of the original image.Compared to the brief flash of the meteor, the wraith-like trail reallyis persistent.After an hour faint remnants of this one could still be traced, expandingto over 80 degrees on the sky.

0

评论

博主关闭了所有页面的评论