保护地球，探索宇宙，发现文明
2022年10月31日 LDN 43: The Cosmic Bat Nebula Image Credit & Copyright: Mark Hanson and Mike Selby; Text: Michelle Thaller (NASA’s GSFC) Explanation: What is the most spook-tacular nebula in the galaxy? One contender is LDN 43, which bears an astonishing resemblance to a vast cosmic bat flying amongst the stars on a dark Halloween night. Located about...
2022年10月30日 Night on a Spooky Planet Image Credit & Copyright: Stéphane Vetter (Nuits sacrées) Explanation: What spooky planet is this? Planet Earth of course, on a dark and stormy night in 2013 at Hverir, a geothermally active area along the volcanic landscape in northeastern Iceland. Triggered by solar activity, geomagnetic storms produced the auroral...
NASA的詹姆斯·韦伯太空望远镜拍摄到的创生之柱的中红外照片令人不寒而栗。存在于这一区域的数千颗恒星似乎消失了，因为恒星通常不会发出太多中红外光，而看似无穷无尽的气体和尘埃层成为了中心。韦布中红外仪器（MIRI）对尘埃的探测非常重要，因为尘埃是恒星形成的主要成分。 影像来源：NASA, ESA, CSA, STScI; Joseph DePasquale (STScI), Alyssa Pagan (STScI) 这不是被时间遗忘的坟墓的空灵风景。这些沾满烟尘的手指也不会伸出来。这些充满气体和尘埃的星柱，遮蔽了几千年来慢慢形成的恒星。NASA的詹姆斯·韦伯太空望远镜在中红外光下拍下了这张奇异的、布满尘埃的创生之柱的照片，为我们展示了一个熟悉景观的新视角。 为什么在韦伯的中红外仪器(MIRI)图像中，中红外光会让...
2022年10月29日 LDN 673: Dark Clouds in Aquila Image Credit & Copyright: Frank Sackenheim, Josef Poepsel, Stefan Binnewies (Capella Observatory Team) Explanation: Part of a dark expanse that splits the crowded plane of our Milky Way galaxy, the Aquila Rift arcs through planet Earth’s skies near bright star Altair. In eerie silhouette against the Milky...
Our James Webb Space Telescope has captured a new image of the famous Pillars of Creation—first imaged by the Hubble Space Telescope in 1995—that reveals new details about the region. The three-dimensional pillars look like majestic rock formations but are far more permeable. These columns are made up of cool interstellar gas and dust that sometimes appear s...
On Oct. 13, 2022, NASA’s Lucy spacecraft captured this image of the Earth and the Moon from 890,000 miles (1.4 million km) away. The image was taken as part of an instrument calibration sequence as the spacecraft approached Earth for its first of three Earth gravity assists. These Earth flybys provide Lucy with the speed required to reach the Trojan asteroid...
2022年10月28日 Seven Years of Halley Dust Image Credit & Copyright: Petr Horalek / Institute of Physics in Opava Explanation: History’s first known periodic comet Halley (1P/Halley) returns to the inner Solar System every 75 years or so. The famous comet made its last appearance to the naked-eye in 1986. But dusty debris from Comet Halley can be seen...
2022年10月27日 Sunset, Moonset, Taj Mahal Image Credit & Copyright: Neelam and Ajay Talwar (TWAN) Explanation: On October 25th, Sun and New Moon set together as seen from Agra, India. Their close conjunction near the western horizon, a partial solar eclipse, was captured in this elevated view in hazy skies near the solitary dome of the Taj Mahal. Of course...
编者按：本文重点介绍了韦伯科学进展中的数据，这些数据尚未通过同行评审。 NASA的詹姆斯·韦伯太空望远镜是专门用来探测来自遥远星系的微弱红外光，并让天文学家瞥见早期宇宙的情况。在我们宇宙的这个早期阶段，星系的性质既不为人所知，也不为人理解。但是在前景星系团的引力透镜的帮助下，暗淡的背景星系可以被放大，并在图像的不同部分多次出现。 星系团MACS0647的巨大引力就像一个宇宙透镜，用来弯曲和放大来自更远的MACS0647-JD星系的光线。它还将JD系统放大了三倍，使其图像出现在三个不同的位置。这些用白框突出显示的图像标记为JD1、JD2和JD3；放大的视图显示在右侧的面板中。在这张来自韦伯近红外相机（NIRCam）仪器的图像中，蓝色被指定为1.15和1.5微米（F115W，F150W）的波长，绿色被指定为2.0和...
This mosaic is composed of images covering the entire sky, taken by the Wide-field Infrared Survey Explorer (WISE) as part of WISE’s 2012 All-Sky Data Release. By observing the entire sky, WISE could search for faint objects, like distant galaxies, or survey groups of cosmic objects. Not visible to the human eye, infrared light is radiated by a plethora of c...