哈勃拍摄的气泡星云
(原标题: The Bubble Nebula from Hubble)
2022-03-23
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大质量恒星可以吹泡泡。这张特色图片显示的可能是所有星泡中最著名的NGC 7635，也被简称为气泡星云。尽管它看起来很脆弱，但这个直径7光年的气泡提供了剧烈过程的证据。气泡中心的上方和左侧是一颗炙热的o型恒星，其亮度是太阳的几十万倍，质量是太阳的45倍左右。猛烈的恒星风和来自那颗恒星的强烈辐射将发光气体的结构与周围分子云中密度更大的物质炸开。迷人的气泡星云和相关的云团位于距仙后座仅7100光年的地方。这张清晰诱人的宇宙气泡图是哈勃太空望远镜先前获得的图像数据的再处理合成图。生日惊喜：APOD在你的生日上放了什么照片？(1995后)
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Massive stars can blow bubbles. The featured image shows perhaps the most famous of all star-bubbles, NGC 7635, also known simply as The Bubble Nebula. Although it looks delicate, the 7-light-year diameter bubble offers evidence of violent processes at work. Above and left of the Bubble's center is a hot, O-type star, several hundred thousand times more luminous and some 45-times more massive than the Sun. A fierce stellar wind and intense radiation from that star has blasted out the structure of glowing gas against denser material in a surrounding molecular cloud. The intriguing Bubble Nebula and associated cloud complex lie a mere 7,100 light-years away toward the boastful constellation Cassiopeia. This sharp, tantalizing view of the cosmic bubble is a reprocessed composite of previously acquired Hubble Space Telescope image data. Birthday Surprise: What picture did APOD feature on your birthday? (post 1995)