2020年12月27日 Cosmic Latte: The Average Color of the Universe Color Credit: Karl Glazebrook & Ivan Baldry (JHU) Explanation: What color is the universe? More precisely, if the entire sky were smeared out, what color would the final mix be? This whimsical question came up when trying to determine […]
2020年12月26日 Fox Fur, Unicorn, and Christmas Tree Image Credit & Copyright: Miguel Claro (TWAN, Dark Sky Alqueva) Explanation: Clouds of glowing hydrogen gas fill this colorful skyscape in the faint but fanciful constellation Monoceros, the Unicorn. A star forming region cataloged as NGC 2264, t
Taken aboard Apollo 8 by Bill Anders, this iconic picture shows Earth peeking out from beyond the lunar surface as the first crewed spacecraft circumnavigated the Moon, with astronauts Anders, Frank Borman, and Jim Lovell aboard. Image Credit: NASA 这幅标志性的照片摄于比尔·安德斯（Bill Anders）的阿波罗8号（Apollo 8）上，这是地球
2020年12月25日 Northern Winter Night Image Credit & Copyright: Adam Block Explanation: Orion always seems to come up sideways on northern winter evenings. Those familiar stars of the constellation of the Hunter are caught above the trees in this colorful night skyscape. Not a star at all but still
2020年12月24日 Portrait of NGC 1055 Image Credit & Copyright: Martin Pugh Explanation: Big, beautiful spiral galaxy NGC 1055 is a dominant member of a small galaxy group a mere 60 million light-years away toward the aquatically intimidating constellation Cetus. Seen edge-on, the island universe sp
2020年12月23日 Jupiter Meets Saturn: A Red Spotted Great Conjunction Image Credit & Copyright: Damian Peach Explanation: It was time for their close-up. Two days ago Jupiter and Saturn passed a tenth of a degree from each other in what is known a Great Conjunction. Although the two planets pass ea
Thousands of sparkling young stars are nestled within the giant nebula NGC 3603, one of the most massive young star clusters in the Milky Way Galaxy. NGC 3603, a prominent star-forming region in the Carina spiral arm of the Milky Way about 20,000 light-years away, reveals stages in the life cycle of
2025年，第一个主动清除太空垃圾的任务，“清洁太空-1”任务，将与织女星二级有效载荷适配器的上半部分会合，将其捕获然后再拖带重新进入地球大气，这块活动的太空垃圾是欧洲织女星运载火箭的一部分，在2013年织女星运载火箭的第二次飞行之后遗留在了太空之中，位于大约800千米×660千米的高空逐渐报废轨道中。“清洁太空-1”任务将遵从减少太空垃圾的规定，使用ESA开发的机械臂技术捕获Vespa，然后有控制地重返地球大气。 图片来源：ClearSpace SA 欧洲空间局（ESA）与瑞士初创公司ClearSpace SA领导的工业团队于12月1日签署了一项价值8600万欧元（约合6.8亿人民币）的合同
2020年12月22日 Trifid Pillars and Jets Image Credit: NASA, ESA, Hubble Space Telescope, HLA; Processing: Advait Mehla Explanation: Dust pillars are like interstellar mountains. They survive because they are more dense than their surroundings, but they are being slowly eroded away by a hostile environme
2020年12月21日 Solstice: Sunrises Around the Year Image Credit & Copyright: Zaid M. Al-Abbadi Explanation: Does the Sun always rise in the same direction? No. As the months change, the direction toward the rising Sun changes, too. The featured image shows the direction of sunrise every month durin
