保护地球，探索宇宙，发现文明
More than 11,000 years ago, a massive, supergiant star came to the end of its life. The star’s core collapsed to form an incredibly dense ball of neutrons, and its exterior was blasted away in an immense release of energy astronomers call a supernova. The light from this supernova first reached Earth from the direction of the constellation Cassiopeia a...
2020年10月23日 Supernova in NGC 2525 Image Credit: NASA, ESA, A. Riess (STScI/JHU) and the SH0ES team Acknowledgment: M. Zamani (ESA/Hubble) Explanation: Big, beautiful, barred spiral galaxy NGC 2525 lies 70 million light-years from the Milky Way. It shines in Earth’s night sky within the boundaries of the southern constellation Puppis. About 60,000 light...
This illustration shows the hot, dense, expanding cloud of debris stripped from neutron stars just before they collided. This cloud produces a kilonova; that is an astronomical event that occurs when two neutron stars or a neutron star and a black hole merge into each other. This cloud shows the visible and infrared light. Within this neutron-rich debris, la...
2020年9月28日 Filaments of the Cygnus Loop Image Credit: ESA/Hubble & NASA, W. Blair; Acknowledgement: Leo Shatz Explanation: What lies at the edge of an expanding supernova? Subtle and delicate in appearance, these ribbons of shocked interstellar gas are part of a blast wave at the expanding edge of a violent stellar explosion that would have been easily ...
这组图片对来自各种太空探测任务和望远镜的不同种类的光的图像进行了组合，以更好地理解宇宙。每个合成图像都包含来自钱德拉X射线天文台（Chandra X-ray Observatory）的X射线数据和其他望远镜的数据。这些图片分别显示了一系列不同的天体，包括梅西耶82星系、阿贝尔2744星系团、超新星1987A、海山二星、车轮星系和螺旋星云。 来源：NASA / CXC / SAO，NASA /STScI，NASA /JPL-Caltech / SSC，ESO /NAOJ / NRAO，NRAO /AUI / NSF，NASA /CXC / SAO / PSU和NASA /ESA 人类可以通过全球范围内的望远镜和太空中的探测器探测到所有不同类型的光。从无线电波到伽玛射线，这种“多波长式”天文...
2020年9月6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 the...
While appearing as a delicate and light veil draped across the sky, this image from the NASA/ESA Hubble Space Telescope actually depicts a small section of the Cygnus supernova blast wave, located around 2,400 light-years away. The name of the supernova remnant comes from its position in the northern constellation of Cygnus (the Swan), where it covers an are...
2020 June 12 NGC 2359: Thor’s Helmet Image Credit & Copyright: Martin Pugh Explanation: NGC 2359 is a helmet-shaped cosmic cloud with wing-like appendages popularly called Thor’s Helmet. Heroically sized even for a Norse god, Thor’s Helmet is about 30 light-years across. In fact, the helmet is more like an interstellar bubble, blown as...
2020 February 17 The Changing Surface of Fading Betelgeuse Image Credit: ESO, M. Montargès et al. Explanation: Besides fading, is Betelgeuse changing its appearance? Yes. The famous red supergiant star in the familiar constellation of Orion is so large that telescopes on Earth can actually resolve its surface — although just barely. The two featured im...
2020 January 19 M1: The Incredible Expanding Crab Nebula Video Credit & Copyright: Detlef Hartmann Explanation: Are your eyes good enough to see the Crab Nebula expand? The Crab Nebula is cataloged as M1, the first on Charles Messier’s famous list of things which are not comets. In fact, the Crab is now known to be a supernova remnant, an expanding...