保护地球，探索宇宙，发现文明
2021年12月12日 Comet Leonard Before Star Cluster M3 Image Credit & Copyright: Dan Bartlett Explanation: Comet Leonard is now visible to the unaided eye — but just barely. Passing nearest to the Earth today, the comet is best seen this week soon after sunset, toward the west, low on the horizon. Currently best visible in the north, by late December th...
2021年12月11日 Postcard from the South Pole Image Credit & Copyright: Aman Chokshi Explanation: From this vantage point about three quarters of a mile from planet Earth’s geographic South Pole, the December 4 eclipse of the Sun was seen as a partial eclipse. At maximum eclipse the New Moon blocked 90 percent of the solar disk. Of course, crews at the...
2021年12月10日 Eclipse on a Polar Day Image Credit & Copyright: Stephanie Ziyi Ye Explanation: During polar day, in Arctic and Antarctic summer, the Sun stays above the horizon for periods of 24 hours or more. Recorded on December 4, this fisheye timelapse image tracks the Sun in multiple frames as it completes a circle in the summer sky above Union Glacie...
2021年12月09日 A Total Eclipse of the Sun Image Credit & Copyright: Theo Boris, Christian A. Lockwood, David Zimmerman (JM Pasachoff Antarctic Expedition) Compositing: Zev Hoover and Ronald Dantowitz (MARS Scientific) Explanation: Few were able to stand in the Moon’s shadow and watch the December 4 total eclipse of the Sun. Determined by celestial me...
2021年12月08日 Comet Hale-Bopp Over Val Parola Pass Image Credit & Copyright: A. Dimai, (Col Druscie Obs.), AAC Explanation: Comet Hale-Bopp, the Great Comet of 1997, became much brighter than any surrounding stars. It was seen even over bright city lights. Away from city lights, however, it put on quite a spectacular show. Here Comet Hale-Bopp was photogr...
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12月06日 Space Station Silhouette on the Moon Image Credit & Copyright: Andrew McCarthy Explanation: What’s that unusual spot on the Moon? It’s the International Space Station. Using precise timing, the Earth-orbiting space platform was photographed in front of a partially lit gibbous Moon last month. The featured composite, taken from Pa...
2021年12月05日 Total Solar Eclipse Below the Bottom of the World Image Credit & Copyright: Petr Horálek (ESO Photo Ambassador, Inst. of Physics in Opava) Explanation: Yesterday there was a total solar eclipse visible only at the end of the Earth. To capture the unusual phenomenon, airplanes took flight below the clouded seascape of Southern Ocean. The feat...
2021年12月04日 Iridescent by Moonlight Image Credit & Copyright: Marcella Giulia Pace Explanation: In this snapshot from November 18, the Full Moon was not far from Earth’s shadow. In skies over Sicily the brightest lunar phase was eclipsed by passing clouds though. The full moonlight was dimmed and momentarily diffracted by small but similar sized w...
2021年12月03日 Comet Leonard and the Whale Galaxy Image Credit & Copyright: Gregg Ruppel Explanation: Sweeping through northern predawn skies, on November 24 Comet Leonard (C/2021 A1) was caught between two galaxies in this composite telescopic image. Sporting a greenish coma the comet’s dusty tail seems to harpoon the heart of NGC 4631 (top) also kn...