保护地球，探索宇宙，发现文明
Looking much like ghosts, a pair of U.S. spacesuits are pictured inside the International Space Station’s Quest airlock ready for an upcoming spacewalk to be conducted by NASA astronauts Thomas Marshburn and Kayla Barron. 看上去很像幽灵，图中一对美国宇航服在国际空间站的探索气闸内，为美国宇航局宇航员托马斯·马什本和凯拉·巴伦即将进行的太空行走做准备。 Image Credit: NASA 图片来源：美国宇航局
2021年11月18日 Full Moonlight Image Credit & Copyright: Zhengjie Wu and Jeff Dai (TWAN) Explanation: A photographer in silhouette stands in bright moonlight as the Full Moon rises in this well-planned telephoto image. Of course, the Full Moon is normally the brightest lunar phase. But on November 18/19, the Full Moon’s light will be dimmed during a d...
Stars are born from clouds of gas and dust that collapse under their own gravitational attraction. As the cloud collapses, a dense, hot core forms and begins gathering dust and gas, creating an object called a “protostar.” 恒星是由气体云和尘埃在自身引力作用下坍缩而形成。随着云团坍缩，会形成一个致密、炽热的核心，并开始聚集尘埃和气体，形成一个称为“原恒星”的物体。 This Hubble infrared image captures a protostar designated J16728...
2021年11月17日 NGC 3314: When Galaxies Overlap Image Credit: NASA, ESA, Hubble; Processing & Copyright: William Ostling (The Astronomy Enthusiast) Explanation: Why doesn’t the nearby galaxy create a gravitational lensing effect on the background galaxy? It does, but since both galaxies are so nearby, the angular shift is much smaller than the angular...
As the International Space Station orbits the Earth, the crew makes observations of the universe and our home planet. This image taken from the space station shows the blue-green waters around the Bahamas, as shown in Space Station highlights for the week of Nov. 8, 2021. 当国际空间站绕地球运行时，宇航员对宇宙和我们的地球进行观察。这张从空间站拍摄的照片显示了巴哈马群岛周围的蓝绿色水域，如图所示，这是2021年11月8日这一周的空间站亮点。 I...
Chas Hoff, visited the Space Environments Facility in 2019 with a group of safety and mission assurance experts prior to testing of the Orion spacecraft. Credits: NASA 2019年于2019年与一组安全和任务保证专家一起参观了空间环境设施，随后对猎户座航天器进行了测试。 影像来源：NASA When Chas Hoff’s children started asking questions about his Native American heritage, he realized he didn’t have many answers. 当查斯...
2021年11月16日 Geminids from Gemini Image Credit & Copyright: Wang Jin Explanation: Where are all of these meteors coming from? In terms of direction on the sky, the pointed answer is the constellation of Gemini. That is why the major meteor shower in December is known as the Geminids — because shower meteors all appear to come from a radiant toward G...
2021年11月15日 Light Pillar over Volcanic Etna Image Credit & Copyright: Giancarlo Tinè Explanation: What happening above that volcano? Something very unusual — a volcanic light pillar. More typically, light pillars are caused by sunlight and so appear as a bright column that extends upward above a rising or setting Sun. Alternatively, other light pi...
2021年11月14日 How to Identify that Light in the Sky Illustration Credit & Copyright: HK (The League of Lost Causes) Explanation: What is that light in the sky? Perhaps one of humanity’s more common questions, an answer may result from a few quick observations. For example — is it moving or blinking? If so, and if you live near a city, the answ...
2021年11月13日 Rosetta’s Comet in Gemini Image Credit & Copyright: Rolando Ligustri (CARA Project, CAST) Explanation: Returning along its 6.4 year orbit, periodic comet Churyumov-Gerasimenko (67P) is caught in this telescopic frame from November 7. Sweeping past background stars in the constellation Gemini the comet’s dusty tail stretches towar...