最初由 meteorobs 发表
[B]为什么那么粗糙??
那么多黑色暗条是什么??
毕竟距离太远,而且亮度太低,恐怕除了VLT,谁都拍不了……
那暗条应该是背景恒星,为了追踪彗星,恒星拉成了线。
简要说明:PR Photo 27c/03 was produced by adding the same frames, however, while shifting their positions according to the motion of the comet. The faint, star-like image of Comet Halley is now visible (in circle, at centre); all other objects (stars, galaxies) in the field are "trailed". A satellite trail is visible at the very top. The field measures 60 x 40 arcsec2; North is up and East is left in both photos. |