桌面酷图系列——桌面37——科罗拉多州上空的Swift-Tuttle彗星尘埃（今年PER照片）
影像提供及版权：Thad V'Soske (Cosmotions.com)http://antwrp.gsfc.nasa.gov/apod/image/0608/perseidcolorado_vsoske_f.jpg
Explanation: The rock formation in the foreground of this night view was recorded on August 10, illuminated by light from a waning gibbous Moon. Even though the sky above also scatters the bright moonlight, a brilliant meteor was captured as it flashed across the scene during the 30 second long exposure. Of course, the meteor was part of the annual rain of dust from periodic Comet Swift-Tuttle known as the Perseid Meteor Shower. Leaving trails that point back to a radiant in the constellation Perseus, the ancient dust particles are vaporized as they enter the atmosphere at about 60 kilometers per second, their visible streaks beginning at altitudes of around 100 kilometers. And though it looks like the knuckles of a giant hand, the curious rock formation can be found in Colorado National Monument park, USA, planet Earth.
原文：http://antwrp.gsfc.nasa.gov/apod/ap060817.html
说明：8月10日夜晚拍摄的这张照片前景的岩石被一轮渐渐升起的月亮照亮。虽然天空中月光的很明亮，但经过30秒的曝光，还是捕捉到了一颗掠过天空的明亮流星。斯威夫特－塔特尔彗星周期性回归后，遗留下的尘埃形成一年一度的流星雨，也就是著名的英仙座流星雨，当然，这颗流星就是其中的一部分。流星留下的遗迹指向了英仙座流星雨的辐射点，当这些远古的尘埃微粒以每秒60公里的速度进入地球大气层后，瞬间就被高温蒸发了。流星掠过留下的可见遗迹大约从100公里的高空开始。这个像握拳巨手的形状古怪的岩石，位于美国科罗拉多州国家纪念公园内。（陈昌 翻译）
译文：http://www.bjp.org.cn/apod/2006-08/17/content_6867.htm N是个漂亮，呵呵~翻的也不错的说·~::070821_09.jpg::
页:
[1]