海鸥星云
(原标题: The Seagull Nebula)
2023-01-19
浏览次数: 21
对地球上的天文学家来说，一大片发光的气体和尘埃呈现出一幅像鸟一样的景象，这就暗示了它的流行绰号——海鸥星云。利用窄带图像数据，这张宇宙鸟的三面板马赛克覆盖了银河系平面上2.5度的狭长地带，靠近大犬座的阿尔法星天狼星的方向。广阔的海鸥星云可能是被连续的超新星爆炸扫过的更大的壳结构的一部分，它的编号为Sh2-296和IC 2177。图中右下方突出的蓝色弧线是逃逸恒星大犬座FN发出的弓形激波。这个气体和尘埃云的复合体与大犬座OB1的其他恒星在海鸥星云估计3800光年的距离上跨越了200光年。
查看原文解释
A broad expanse of glowing gas and dust presents a bird-like visage to astronomers from planet Earth, suggesting its popular moniker - The Seagull Nebula. Using narrowband image data, this 3-panel mosaic of the cosmic bird covers a 2.5 degree swath across the plane of the Milky Way, near the direction of Sirius, alpha star of the constellation Canis Major. Likely part of a larger shell structure swept up by successive supernova explosions, the broad Seagull Nebula is cataloged as Sh2-296 and IC 2177. The prominent bluish arc below and right of center is a bow shock from runaway star FN Canis Majoris. This complex of gas and dust clouds with other stars of the Canis Majoris OB1 association spans over 200 light-years at the Seagull Nebula's estimated 3,800 light-year distance.
© Carlos Taylor