保护地球，探索宇宙，发现文明
2020 June 20 Northern Summer on Titan Image Credit: Cassini Imaging Team, SSI, JPL, ESA, NASA Explanation: Today’s solstice brings summer to planet Earth’s northern hemisphere. But the northern summer solstice arrived for ringed planet Saturn over three years ago on May 24, 2017. Orbiting the gas giant, Saturn’s moon Titan experiences the S...
2020 June 19 The Veins of Heaven Image Credit & Copyright: Ruslan Merzlyakov (RMS Photography) Explanation: Transfusing sunlight through a darkened sky, this beautiful display of noctilucent clouds was captured earlier this week, reflected in calm waters from Nykobing Mors, Denmark. From the edge of space, about 80 kilometers above Earth’s surface...
2020 June 18 The Tadpoles of IC 410 Image Credit & Copyright: Trevor Jones Explanation: This telescopic close-up shows off the central regions of otherwise faint emission nebula IC 410, captured under backyard suburban skies with narrowband filters. It also features two remarkable inhabitants of the cosmic pond of gas and dust. Below and right of center...
This artist’s concept shows an astronaut on Mars, as viewed through the window of a spacecraft. NASA is returning astronauts to the Moon and will test technology there that will be useful for sending the first astronauts to the Red Planet. Image Credit: NASA/JPL-Caltech 这幅艺术家的概念图展示了透过宇宙飞船的窗户看到的火星上的宇航员。美国国家航空航天局(NASA)正在将宇航员送回月球，并将在那里测试用于将第一批宇航员送往红色星球的技术...
2020 June 17 Magnetic Streamlines of the Milky Way Image Credit: ESA, Planck; Text: Joan Schmelz (USRA) Explanation: What role do magnetic fields play in interstellar physics? Analyses of observations by ESA’s Planck satellite of emission by small magnetically-aligned dust grains reveal previously unknown magnetic field structures in our Milky Way Gala...
Seen here in incredible detail, thanks to the NASA/ESA Hubble Space Telescope, is the starburst galaxy formally known as PLCK G045.1+61.1. The galaxy, which appears as multiple reddish dots near the center of the image, is being gravitationally lensed by a cluster of closer galaxies, also seen in the image. Gravitational lensing occurs when a large distribut...
One of an artist’s most fundamental characteristics is a capacity to bridge the gap between imagination and illustration and bring even the most abstruse and metaphysical concepts to life. Scientists and engineers understand this process all too well as they strive to coax into existence new theories, experiments and technologies. A striking example of that ...
6月10日，NASA主管科学的副局长Thomas Zurbuchen，由于新型冠状病毒，影响到了詹姆斯·韦伯太空望远镜工作排班，会推迟原计划2021年3月的发射。 技术人员正在检查詹姆斯·韦伯空间望远镜（James Webb Space Telescope）的关键部件 – 可展开的塔架组件（Deployable Tower Assembly）。该部件在太空中将完全展开。 图片来源：诺斯罗普·格鲁曼公司（Northrop Grumman ） 为了测试詹姆斯·韦伯空间望远镜是否为太空之旅做好了准备，技术人员成功地命令航天器部署并伸展了一个关键部件，即可展开的塔架组件。 可展开的塔架组件主要目的是在航天器上部（安装其标志性金镜和科学仪器的部分）与航天器下部隔开。航天器下部，也被称为航天器总线（spacec...
2020 June 16 APOD is 25 Years Old Today Video Credits: Idea & Lead: Alex Dantart (observatorio.info), Coordinators: Josef Chlachula (astro.cz/apod) & Alice Allen (ASCL); & APOD’s Tireless Volunteer Army of Translators and Social Media Digerati; Music: unminus.com: They Say, Sad Circus, Naya, Please Wait, Good God Explanation: Welcome to ...
2020 June 15 A Ring of Fire Sunrise Solar Eclipse Video Credit: Colin Legg & Geoff Sims; Music: Peter Nanasi Explanation: What’s rising above the horizon behind those clouds? It’s the Sun. Most sunrises don’t look like this, though, because most sunrises don’t include the Moon. In the early morning of 2013 May 10, however, from We...