保护地球，探索宇宙，发现文明
2022年8月19日 Saturn: 1993 – 2022 Image Credit & Copyright: Tunc Tezel (TWAN) Explanation: Saturn is the most distant planet of the Solar System easily visible to the unaided eye. With this extraordinary, long-term astro-imaging project begun in 1993, you can follow the ringed gas giant for one Saturn year as it wanders once around the ecliptic plane...
2022年8月18日 Full Moon Perseids Image Credit & Copyright: Juan Carlos Casado (Starry Earth, TWAN) Explanation: The annual Perseid meteor shower was near its peak on August 13. As planet Earth crossed through streams of debris left by periodic Comet Swift-Tuttle meteors rained in northern summer night skies. But even that night’s nearly Full Moon shi...
2022年8月16日 A Meteor Wind over Tunisia Image Credit & Copyright: Makrem Larnaout Explanation: Does the Earth ever pass through a wind of meteors? Yes, and they are frequently visible as meteor showers. Almost all meteors are sand-sized debris that escaped from a Sun-orbiting comet or asteroid, debris that continues in an elongated orbit around the Sun. C...
2022年6月4日 Tau Herculids from Space Image Credit & Copyright: Zhuoxiao Wang, Yangwang-1 Space Telescope, Origin.Space Explanation: On May 31 tens of parallel meteor streaks were recorded in this 8 degree wide field of view of planet Earth’s limb from space. The image is one of a series of 5 minute long observations by the orbiting Yangwang-1 space ...
2022年6月1日 Tau Herculids Meteors over Kitt Peak Telescopes Image Credit & Copyright: Jianwei Lyu (Steward Obs., U. Arizona) Explanation: It wasn’t the storm of the century — but it was a night to remember. Last night was the peak of the Tau Herculids meteor shower, a usually modest dribble of occasional meteors originating from the disintegra...
2022年4月28日 Lyrid of the Lake Image Credit & Copyright: Jeff Dai (TWAN) Explanation: In the early hours of April 24 this bright Lyrid meteor flashed along the central Milky Way. For a moment, it cast a bright reflection across Lake Nian, Yunnan province, China. The annual Lyrid meteor shower, one of the oldest known, is active in late April, as our fair ...
2022年1月8日 Quadrantids of the North Image Credit & Copyright: Cheng Luo Explanation: Named for a forgotten constellation, the Quadrantid Meteor Shower puts on an annual show for planet Earth’s northern hemisphere skygazers. The shower’s radiant on the sky lies within the old, astronomically obsolete constellation Quadrans Muralis. That locati...
2021年12月17日 Geminid of the North Image Credit & Copyright: Alvin Wu Explanation: An arid expanse of the Tengger Desert in north-central China, planet Earth fills the foreground of this starry scene. A widefield panoramic view, it was recorded shortly after moonset in the local predawn hours of December 14. Pictured in the still dark sky, stars of the no...
2021年12月16日 Geminids of the South Image Credit & Copyright: Fefo Bouvier Explanation: Fireflies flash along a moonlit countryside in this scene taken on the night of December 13/14 from southern Uruguay, planet Earth. On that night meteors fell in the partly cloudy skies above during the annual Geminid meteor shower. Frames recorded over a period of 1.5...
每年十二月，我们都有机会看到我们最喜欢的流星雨之一——双子座流星雨。此次流星雨将持续到17日，并将在13日晚至14日上午达到高峰，这是观看流星雨的最佳时间。 所有的流星似乎都来自天空中的同一个地方，称为辐射点。双子座流星雨似乎从双子座中的一个点辐射出来，因此得名“双子座流星雨”。该图显示了NASA火球网络在2020年12月观测到的388颗时速为35公里/秒的流星的辐射。所有的辐射点都在双子座，这意味着它们属于双子座流星雨。 影像来源：美国宇航局 双子座是由一个被称为3200法厄同的天体的碎片造成的，它的起源是一些争论的话题。一些天文学家认为它是一颗已灭绝的彗星，根据观测结果表明，有少量物质离开法厄同的表面。另一些人则认为它一定是小行星，因为它的轨道和它与主带小行星帕拉斯相似。 无论法厄同的性质如何，观察结果显示...