保护地球, 探索宇宙, 发现文明
2022年11月20日 Airglow Ripples over Tibet Image Credit & Copyright: Jeff Dai Explanation: Why would the sky look like a giant target? Airglow. Following a giant thunderstorm over Bangladesh in late April, giant circular ripples of glowing air appeared over Tibet, China, as pictured here. The unusual pattern is created by atmospheric gravity waves, waves of...
2022年6月5日 Two Black Holes Dancing in 3C 75 Image Credit: X-Ray: NASA/CXC/D. Hudson, T. Reiprich et al. (AIfA); Radio: NRAO/VLA/ NRL Explanation: What’s happening at the center of active galaxy 3C 75? The two bright sources at the center of this composite x-ray (blue)/ radio (pink) image are co-orbiting supermassive black holes powering the giant radio ...
2021年12月07日 Ninety Gravitational Wave Spectrograms and Counting Image Credit: NSF, LIGO, VIRGO, KAGRA, Georgia Tech, Vanderbilt U.; Graphic: Sudarshan Ghonge & Karan Jani Explanation: Every time two massive black holes collide, a loud chirping sound is broadcast out into the universe in gravitational waves. Humanity has only had the technology to hear t...
2021年7月14日 GW200115: Simulation of a Black Hole Merging with a Neutron Star Video Credit: Simulation: S.V. Chaurasia (Stockholm U.), T. Dietrich (Potsdam U. & MPIGP); Visualization: T. Dietrich (Potsdam U. & MPIGP), N. Fischer, S. Ossokine, H. Pfeiffer (MPIGP) Explanation: What happens when a black hole destroys a neutron star? Analyses indicate th...
2020年11月4日 Fifty Gravitational Wave Events Illustrated Image Credit: LIGO Virgo Collaborations, Frank Elavsky, Aaron Geller, Northwestern U. Explanation: Over fifty gravitational wave events have now been detected. These events mark the distant, violent collisions of two black holes, a black hole and a neutron star, or two neutron stars. Most of the 50 event...
2020年9月8日 GW190521: Unexpected Black Holes Collide Illustration Credit: Raúl Rubio (Virgo Valencia Group, The Virgo Collaboration) Explanation: How do black holes like this form? The two black holes that spiraled together to produce the gravitational wave event GW190521 were not only the most massive black holes ever seen by LIGO and VIRGO so far, their mass...
合并后的黑洞 版权：ESA 当两个超大质量黑洞（supermassive black hole）相撞时，会发生什么？在不久的未来，结合欧洲空间局（European Space Agency，ESA）两个任务的观测，雅典娜（Athena）和空间激光干涉仪（LISA），这一谜题就会揭晓，我们将能深入研究这样的宇宙级冲突以及其神秘莫测的后续故事。 这种黑洞之所以被称为“超大质量黑洞”，是因为它们的质量为太阳的数百万到数十亿倍，所处的位置也是宇宙中质量总和最大的那些星系中心。至今，我们都没弄清楚这些体型和密度都巨大无比的物质是如何形成的，也不知道是什么力量让其中的小小的一部分，以极高的速率吞噬周围的物质，在电磁波谱中产生大量的辐射，并将所在的宿主星系变成“活跃的星系核（galactic nucleus）”。 解决现代天...