Copyright:
Josh Dury
中文翻譯:
你知道天空中那些彎彎的光線是什麼嗎？這是流星！具體來說，就是今年的英仙座流星雨。在過去的幾個星期裡，許多人在晚上拍下了英仙座流星的美麗圖像，然後把這些照片合成在一起，形成一個精彩的畫面。雖然流星都是沿著筆直的路徑飛行，但因為拍照的相機使用了廣角鏡頭，所以這些路徑看起來是彎彎的。這些流星的軌跡可以追溯到一個叫做輻射點的地方，正好在畫面上方偏右的位置，這裡是英仙座的星座。此外，同一台相機還拍攝了背景的深空圖像，展示了幾乎直立於畫面中央的銀河系中心帶。在前景中，你可以看到英國多塞特的石灰岩拱門，叫做Durdle Door，據說這個名字已經流傳了大約一千年！
原文:
What are those curved arcs in the sky? Meteors — specifically, meteors from this year’s Perseid meteor shower. Over the past few weeks, after the sky darkened, many images of Perseid meteors were captured separately and merged into a single frame, taken earlier. Although the meteors all traveled on straight paths, these paths appear slightly curved by the wide-angle lens of the capturing camera. The meteor streaks can all be traced back to a single point on the sky called the radiant, here just off the top of the frame in the constellation of Perseus. The same camera took a deep image of the background sky that brought up the central band of our Milky Way galaxy running nearly vertically through the featured image’s center. The limestone arch in the foreground in Dorset, England is known as Durdle Door, a name thought to survive from a thousand years ago.
來源:NASA每日圖片
