保护地球，探索宇宙，发现文明
2023年3月3日 RCW 86: Historical Supernova Remnant Image Credit: CTIO/NOIRLab/DOE/NSF/AURA, T.A. Rector (Univ.of Alaska/NSF’s NOIRLab), J. Miller (Gemini Obs./NSF’s NOIRLab), M. Zamani & D. de Martin (NSF’s NOIRLab) Explanation: In 185 AD, Chinese astronomers recorded the appearance of a new star in the Nanmen asterism. That part of the sky is identified wi...
2023年1月15日 M1: The Crab Nebula from Hubble Image Credit: NASA, ESA, Hubble, J. Hester, A. Loll (ASU) Explanation: This is the mess that is left when a star explodes. The Crab Nebula, the result of a supernova seen in 1054 AD, is filled with mysterious filaments. The filaments are not only tremendously complex, but appear to have less mass than expelled in th...
2022年11月29日 The Gum Nebula Supernova Remnant Image Credit & Copyright: Victor Lima Explanation: Because the Gum Nebula is the closest supernova remnant, it is actually hard to see. Spanning 40 degrees across the sky, the nebula appears so large and faint that it is easily lost in the din of a bright and complex background. The Gum Nebula is highlighted ...
When a massive star collapsed in the Cassiopeia constellation, it generated a supernova explosion with some of the fastest shockwaves in the Milky Way. These speedy shock waves are one of the reasons the Cassiopeia A (Cas A) supernova remnant was chosen to be our Imaging X-ray Polarimetry Explorer’s (IXPE) first observed object. This composite image, made of...
2022年10月2日 Supernova Cannon Expels Pulsar J0002 Image Credit: F. Schinzel et al. (NRAO, NSF), Canadian Galactic Plane Survey (DRAO), NASA (IRAS); Composition: Jayanne English (U. Manitoba) Explanation: What could shoot out a neutron star like a cannon ball? A supernova. About 10,000 years ago, the supernova that created the nebular remnant CTB 1 not only des...
影像来源：X射线：NASA/CXC/GSFC/B. J. Williams et al.；可见光：NASA/ESA/STScI 虽然天文学家已经看到了银河系和附近星系中数十颗爆炸恒星的碎片，但通常很难确定恒星消亡的时间线。通过使用NASA望远镜研究邻近星系中壮观的超新星遗迹，一组天文学家已经找到了足够的线索来帮助时光倒流。 超新星遗迹SNR 0519-69.0（简称SNR 059）是白矮星爆炸产生的碎片。在达到临界质量后，无论是从伴星中吸取物质还是与另一颗白矮星合并，恒星都经历了热核爆炸并被摧毁。科学家们将这种被称为Ia型的超新星用于广泛的科学研究，从热核爆炸研究到测量数十亿光年的星系距离。 SNR 0519位于大麦哲伦星云中，这是一个距离地球160,000光年的小星系。这张合成图像显示了来自NASA钱德拉X射...
Supernovas are the explosive deaths of the universe’s most massive stars. In death, these objects blast powerful waves into the cosmos, destroying much of the dust surrounding them. This 2007 composite from NASA’s Spitzer Space Telescope and Chandra X-ray Observatory shows the remnant of such an explosion, known as N132D, and the environment it i...
2022年5月28日 RCW 86: Historical Supernova Remnant Image Credit & Copyright: Martin Pugh Explanation: In 185 AD, Chinese astronomers recorded the appearance of a new star in the Nanmen asterism. That part of the sky is identified with Alpha and Beta Centauri on modern star charts. The new star was visible for months and is thought to be the earliest record...
情人节到来之际，NASA于2021年12月9日发射的X射线成像偏振探测器在完成为期一个月的调试阶段后，首次提供了成像数据。 天文台上的所有仪器都运行良好，该天文台正在研究宇宙中一些最神秘和极端的物体。 IXPE首先将其X射线聚焦在仙后座A上，这是一个由17世纪发现的一颗恒星爆炸后的残骸组成的物体。爆炸产生的冲击波席卷了周围的气体，将其加热到高温，并加速宇宙射线粒子，形成一团在X射线光下发光的云。其他望远镜以前也研究过仙后座A，但IXPE将允许研究人员以新的方式对其进行研究。 这张超新星仙后座A的图像结合了NASA的X射线成像偏振探测器收集的一些第一批X射线数据（以洋红色显示）和来自 NASA钱德拉X射线天文台的高能X射线数据（以蓝色显示）。 影像来源：NASA/CXC/SAO/IXPE 在上图中，洋红色的饱和度...
2022年2月9日 Eta Car: 3D Model of the Most Dangerous Star Known Video Credit: NASA, CXC, April Hobart; Text: Michael F. Corcoran (NASA, Catholic U., HEAPOW) Explanation: What’s the most dangerous star near earth? Many believe it’s Eta Carinae, a binary star system about 100 times the mass of the Sun, just 10,000 light years from earth. Eta Carinae i...