2025年10月21日
IC 1805: 心脏星云
影像提供与版权: Toni Fabiani
说明: 是什么让心脏星云充满电力？是什么让心脏星云如此充满活力？首先，在左侧的大型发射星云，被编录为IC 1805，看起来有些像人类的心脏。这个星云发出明亮的红光，这红光是由其最主要的元素氢所发出的，但这张长时间曝光的影像也混合了由硅（黄色）和氧（蓝色）所发出的光。在心脏星云的中心是来自疏散星团Melotte 15的年轻恒星，它们正用其激发原子的高能光和星风侵蚀掉几根形状独特的尘埃柱。心脏星云位于星座 仙后座方向，距离我们约7,500光年。心脏星云的右上方是伴星云鱼头星云。这张广阔而深邃的影像清晰地显示，发光炽热的气体从各个方向环绕着心脏星云。
明日的图片: space bat
Due to the lapse in federal government funding, NASA is not updating APOD website. We sincerely regret this inconvenience.
由于美国联邦政府资金中断，NASA目前暂停更新APOD网站。对此带来的不便，我们深感抱歉。
英文原文:
Explanation: What electrifies the Heart Nebula? First, the large emission nebula on the left, catalogued as IC 1805 , looks somewhat like a human heart . The nebula glows brightly in red light emitted by its most prominent element, hydrogen , but this long-exposure image was also blended with light emitted by silicon (yellow) and oxygen (blue). In the center of the Heart Nebula are young stars from the open star cluster Melotte 15 that are eroding away several picturesque dust pillars with their atom-exciting energetic light and winds. The Heart Nebula is located about 7,500 light years away toward the constellation of Cassiopeia . At the top right of the Heart Nebula is the companion Fishhead Nebula . This wide and deep image clearly shows, though, that glowing gas surrounds the Heart Nebula in all directions.
