2019 February 20 Doomed Star Eta Carinae Image Credit: NASA, ESA, Hubble; Processing & License: Judy Schmidt Explanation: Eta Carinae may be about to explode. But no one knows when – it may be next year, it may be one million years from now. Eta Carinae’s mass – about 100 times […]
Eat. Breathe. Do ccience. Sleep later. That’s the motto of Derrick Pitts, NASA Solar System Ambassador.
北京时间2019年2月19日23时的月亮(模拟) Credit:NASA 今天是传统的元宵佳节，农历新年的第一个满月，对全世界各地华人来说，是一个非常重要的节日，我们经常结伴出门赏月，猜灯谜，吃元宵，看焰火等等。 有灯无月不娱人，有月无灯不算春。 春到人间人似玉，灯烧月下月如银。 满街珠翠游村女，沸地笙歌赛社神。 不展芳尊开口笑，如何消得此良辰。 ——唐寅《元宵》 旋转的月球 Credit：LRO 从地球望去，当然我们目前只能从地球望去，今晚的满月是今年中最大且最亮的超级月亮，为什么这么说？因为今晚的满月离地球最近。月球绕地球的轨道，如太阳系中所有天体的轨道，不是一个圆形，而是一个椭圆，这就有
2019 February 19 Comet Iwamoto Before Spiral Galaxy NGC 2903 Video Credit & Copyright: Norbert Span Explanation: It isn’t every night that a comet passes a galaxy. Last Thursday, though, binocular comet C/2018 Y1 (Iwamoto) moved nearly in front of a spiral galaxy of approximately the same
“赫拉”与史上最小小行星 版权：ESA–ScienceOffice.org 作为欧洲空间局（ESA）的小行星防御任务，“赫拉”（Hera）将创造一项新的太空纪录。“赫拉”不仅将是第一个探索双小行星（binary asteroid）系统的航天器，而且会成为第一个探索最小小行星的航天器，因为在这个双小行星“迪迪莫斯”（Disymos）中，更小的那个小行星大小的与埃及的胡夫金字塔（Pyramid of Khufu）大小相当，将成为有史以来被探索的最小的小行星。 两颗小行星孰大孰小从远处看是难以分辨的，需要近距离直接比较。由行星学会（Planetary Society）所制的著名星体大小比例图，包含了
2019 February 18 Dragon Aurora over Iceland Image Credit & Copyright: Jingyi Zhang & Wang Zheng Explanation: Have you ever seen a dragon in the sky? Although real flying dragons don’t exist, a huge dragon-shaped aurora developed in the sky over Iceland earlier this month. The aurora wa
2019 February 17 Shadow of a Martian Robot Image Credit: Mars Exploration Rover Mission, JPL, NASA Explanation: What if you saw your shadow on Mars and it wasn’t human? Then you might be the Opportunity rover currently exploring Mars. Opportunity explored the red planet from 2004 to 2018, find
2019 February 16 NGC 2359: Thor’s Helmet Image Credit & Copyright: Ignacio Diaz Bobillo Explanation: NGC 2359 is a helmet-shaped cosmic cloud with wing-like appendages popularly called Thor’s Helmet. Heroically sized even for a Norse god, Thor’s Helmet is about 30 light-years a
NASA is preparing to explore electric-powered flight with the X-57 Maxwell, a unique all-electric aircraft which features 14 propellers along its wing.
