夢(mèng)幻的星云，人類前的文明

Ten thousand years ago, before the dawn of recorded human history, a new light would have suddenly have appeared in the night sky and faded after a few weeks. Today we know this light was from a supernova, or exploding star, and record the expanding debris cloud as the Veil Nebula, a supernova remnant. Imaged with color filters featuring light emitted by sulfur (red), hydrogen (green), and oxygen (blue), this deep wide-angle view was processed to remove the stars and so better capture the impressive glowing filaments of the Veil. Also known as the Cygnus Loop, the Veil Nebula is roughly circular in shape and covers nearly 3 degrees on the sky toward the constellation of the Swan (Cygnus). Famous nebular sections include the Bat Nebula, the Witch's Broom Nebula, and Fleming's Triangular Wisp. The complete supernova remnant lies about 1,400 light-years away.?

一萬(wàn)年前，在有記載的人類歷史出現(xiàn)之前，夜空中會(huì)突然出現(xiàn)一道新光，幾周后就會(huì)消失。今天，我們知道這道光來(lái)自一顆超新星或爆炸的恒星，并將膨脹的碎片云記錄為面紗星云，這是一顆超新星遺跡。這張深廣角照片采用濾色鏡拍攝，濾色鏡以硫（紅色）、氫（綠色）和氧（藍(lán)色）發(fā)出的光為特征，經(jīng)過(guò)處理后可以去除恒星，從而更好地捕捉到面紗上令人印象深刻的發(fā)光細(xì)絲。面紗星云也被稱為天鵝座環(huán)，形狀大致呈圓形，在天空中覆蓋近3度，朝向天鵝座（天鵝座）。著名的星云部分包括蝙蝠星云、女巫掃帚星云和弗萊明的三角星云。完整的超新星遺跡位于1400光年之外。