2025年9月19日
The NGC 6914 Complex
Image Credit & Copyright: Tommy Lease
Explanation: A study in contrasts, this colorful cosmic skyscape features stars, dust, and glowing gas in the vicinity of NGC 6914. The interstellar complex of nebulae lies some 6,000 light-years away, toward the high-flying northern constellation Cygnus and the plane of our Milky Way Galaxy. Obscuring interstellar dust clouds appear in silhouette while reddish hydrogen emission nebulae, along with the dusty blue reflection nebulae, fill the cosmic canvas. Ultraviolet radiation from the massive, hot, young stars of the extensive Cygnus OB2 association ionize the region’s atomic hydrogen gas, producing the characteristic red glow as protons and electrons recombine. Embedded Cygnus OB2 stars also provide the blue starlight strongly reflected by the dust clouds. The over one degree wide telescopic field of view spans about 100 light-years at the estimated distance of NGC 6914.
Tomorrow’s picture: light-weekend
NGC 6914星云复合体
影像提供与版权: Tommy Lease
说明: 这幅缤纷的宇宙景象展现了鲜明的对比，包含的恒星、尘埃与发光气体，环绕在NGC 6914附近。这群星云复合体距离地球约6,000光年，位于北方的高悬星座——天鹅座方向，正好落在我们银河系的盘面上。遮蔽性的星际尘埃云以剪影的形式出现，而红色的氢发射星云与蓝色的反射星云交织成一幅宇宙画布。大质量、炙热且年轻的恒星来自庞大的天鹅座OB2 II星协，它们辐射的紫外线游离了区域中的氢原子气体，当质子与电子重新结合时发出特征性的红光。同时，这些嵌入天鹅座的恒星提供了强烈的蓝色星光，被尘埃云散射后形成蓝色的反射星云。这幅超过1度宽的望远镜影像，在NGC 6914的距离估计下，相当于跨越约100光年的尺度。
明日的图片: light-weekend
