保护地球，探索宇宙，发现文明
2022年10月6日 NGC 4631: The Whale Galaxy Image Credit & Copyright: Michael Sherick Explanation: NGC 4631 is a big beautiful spiral galaxy. Seen edge-on, it lies only 25 million light-years away in the well-trained northern constellation Canes Venatici. The galaxy’s slightly distorted wedge shape suggests to some a cosmic herring and to others its pop...
2022年10月5日 Expanding Plume from DART’s Impact Video Credit: Les Makes Observatory, J. Berthier, F. Vachier, A. Klotz, P. Thierry, T. Santana-Ros, ESA NEOCC, D. Föhring, E. Petrescu, M. Micheli Explanation: What happens if you crash a spaceship into an asteroid? In the case of NASA’s DART spaceship and the small asteroid Dimorphos, as happened las...
2022年10月4日 Star-Forming Eagle Nebula without Stars Image Credit & Copyright: Yannick Akar Explanation: The whole thing looks like an eagle. A closer look at the Eagle Nebula’s center, however, shows the bright region is actually a window into the center of a larger dark shell of dust. Through this window, a brightly-lit workshop appears where a wh...
This is the last complete image of the asteroid Dimorphos, as seen by our Double Asteroid Redirection Test (DART) two seconds before impact. The Didymos Reconnaissance and Asteroid Camera for Optical navigation (DRACO) imager aboard captured a 100-foot-wide patch of the asteroid. The DART spacecraft streamed these images from its DRACO camera back to Earth i...
2022年10月3日 Jupiter’s Europa from Spacecraft Juno Image Credit & License: NASA, JPL-Caltech, SwRI, MSSS; Processing: Andrea Luck Explanation: What mysteries might be solved by peering into this crystal ball? In this case, the ball is actually a moon of Jupiter, the crystals are ice, and the moon is not only dirty but cracked beyond repair. Neverthe...
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...
十月份的天空会发生什么？夜晚有巨行星，火星改变方向，来自猎户座的流星。
2022年10月1日 Lunation Matrix Image Credit & Copyright: Tunc Tezel (TWAN) Explanation: Observe the Moon every night and you’ll see its visible sunlit portion gradually change. In phases progressing from New Moon to Full Moon to New Moon again, a lunar cycle or lunation is completed in about 29.5 days. Top left to bottom right, this 7×4 matrix of...