Copyright:Martin Pugh
原文:
Fantastic shapes lurk in clouds of glowing gas in the giant star forming region NGC 6188. The emission nebula is found about 4,000 light years away near the edge of a large molecular cloud unseen at visible wavelengths, in the southern constellation Ara. Massive, young stars of the embedded Ara OB1 association were formed in that region only a few million years ago, sculpting the dark shapes and powering the nebular glow with stellar winds and intense ultraviolet radiation. The recent star formation itself was likely triggered by winds and supernova explosions, from previous generations of massive stars, that swept up and compressed the molecular gas. Joining NGC 6188 on this cosmic canvas, visible toward the lower right, is rare emission nebula NGC 6164, also created by one of the region’s massive O-type stars. Similar in appearance to many planetary nebulae, NGC 6164’s striking, symmetric gaseous shroud and faint halo surround its bright central star near the bottom edge. The impressively wide field of view spans over 3 degrees (six full Moons), corresponding to over 200 light years at the estimated distance of NGC 6188. Three image sets have been included in the featured composite.
中文翻譯:
在發光氣體的巨大恆星形成區 NGC 6188 中，隱藏著奇妙的形狀。這個發射星雲位於約 4,000 光年外，位於南天的星座 Ara 之邊緣，一個在可見光波段無法觀察到的大型分子雲中。這個區域的年輕超級巨星群 Ara OB1 協會約在幾百萬年前形成，雕塑出暗形狀，並用恆星風和強烈的紫外線輻射點亮星雲。近期的恆星形成很可能是由於之前幾代大型恆星的風和超新星爆炸，這些事件使分子氣體被壓縮並聚集。與 NGC 6188 一起，位於畫面右下方的罕見發射星雲 NGC 6164 也是由該區域的一顆大型 O 型恆星所創造。NGC 6164 擁有類似許多行星星雲的外觀，其對稱的氣體雲罩和微弱的光環將明亮的中心恆星環繞於底部邊緣。這幅壯觀的廣角視野跨越超過 3 度（六個滿月），在 NGC 6188 的估計距離下對應超過 200 光年。這幅展示的合成圖包含了三組圖片。
#NGC6188 #NGC6164 #星雲 #恆星形成 #宇宙 #天文學 #Ara星座 #夜空 #科學探索 #星際旅行 #宇宙之美 #發光氣體
來源:NASA每日圖片
