2025年10月7日
超新星安可: 多次观测到的第二次超新星爆发
影像提供: Webb (main): NASA, ESA, CSA, STScI, J. Pierel (STScI) & A. Newman (Carnegie Inst. for Science);
Hubble (rollover): NASA, ESA, STScI, S. A. Rodney (U. South Carolina) & G. Brammer (NBI, U. Copenhagen)
说明: 现在，在同一星系中又出现了第二颗超新星。原因是巨大的前景星系团 (MACS J0138) 的引力透镜效应——它创造了一个完美排列的背景星系团 (MRG-M0138) 的多个图像。特别有趣的是这个背景星系中有年轻恒星不断爆发。每次超新星爆炸的图像都会通过星系团的不同路径多次到达我们面前。最初的透镜超新星群，显示在翻转图中，被称为安魂曲，于2016年首次被哈勃太空望远镜观测到。第二组透镜超新星被称为安可，于2023年首次被韦伯太空望远镜观测到。预计会有更多这些超新星的影像即将到来，它们到达的时间将帮助人类更好地理解星系团的质量分布、超新星本身，甚至可能是宇宙。
明日的图片: wizard stars
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: Now a second supernova in this same galaxy is repeating. The cause is the gravitational lens effect of a massive foreground cluster of galaxies (MACS J0138) — it creates multiple images of a perfectly aligned background galaxy (MRG-M0138). What’s particularly interesting is that this background galaxy has young stars that keep blowing up. And images of each supernova explosion keep coming to us multiple times through different paths through the cluster. The original lensed supernova set, shown in the rollover , is called Requiem and was first seen by the Hubble Space Telescope in 2016. This second lensed supernova set is called Encore and was first seen by the Webb Space Telescope in 2023. More images from these supernovas are predicted to be on the way , and exactly when they arrive should help humanity to better understand the mass distribution of the galaxy cluster, the supernovas themselves, and possibly even the universe.
