保护地球，探索宇宙，发现文明
2019 October 31 The Ghostly Veil Nebula Image Credit & Copyright: Anis Abdul Explanation: A ghostly visage on a cosmic scale, these remains of shocked, glowing gas haunt planet Earth’s sky toward the constellation of Cygnus and form the Veil Nebula. The nebula itself is a large supernova remnant, an expanding cloud born of the death explosion of a...
上面的动图来自NASA的斯皮策太空望远镜，这张红外图像显示的是巨大恒星所“雕刻”出的气体和尘埃云。在动图的最后，星云中的南瓜灯轮廓被勾勒出来，研究人员对这一区域起了个可爱的名字，叫作“杰克南瓜灯星云”。 图片版权：NASA/喷气推进实验室-加州理工学院 在这张由美国航天航空局（NASA）的斯皮策太空望远镜（Spitzer Space Telescope）拍摄的照片中，经过恒星“雕刻”的气体和尘埃云看起来就像是宇宙中一个巨大的杰克南瓜灯（jack-o’-lantern）。 这颗宇宙南瓜灯的“创造者”，是一颗巨大的O型恒星（O-type star），比太阳的质量要重上大约15至20倍。科学家对南瓜灯区域的最新研究表明，这颗恒星发出的强劲辐射流和粒子流可能将周围的星际尘埃和气体向外拨扫，从而在这片星云（n...
国际空间站是美国国家航空航天局（NASA）阿尔特弥斯（Artemis）计划的基石，该计划将在2024年前将第一位女性和下一位男性登上月球。作为对微重力环境中生存如何影响生物体（尤其是人类）进行长期研究，以及测试使人类得以月球上工作的技术的唯一场所，空间站是在月球上建立可持续存在的一项独特资产。 登月任务将包括在“门户”（Gateway）月球空间站上、在月球表面以及包括“猎户座”(Orion)飞船和人类着陆系统在内的多个航天器上的时间组合。探索月球的技能和技术将有助于建立未来火星任务所需的能力。国际空间站这个轨道实验室为通向月球和火星所做的贡献如下所示。 人的因素 使宇航员在太空中保持安全是月球任务的重中之重，这需要对微重力环境下生活如何影响人类有广泛的了解。国际空间站提供了近20年的人类研究机会，这是其他平台无...
A Northrop Grumman Antares rocket is seen as it rolls out to Pad-0A, Tuesday, Oct. 29, 2019, at NASA’s Wallops Flight Facility in Virginia. Northrop Grumman’s 12th contracted cargo resupply mission with NASA to the International Space Station will deliver about 8,200 pounds of science and research, crew supplies and vehicle hardware to the orbital labo...
2019 October 30 M42: Inside the Orion Nebula Image Credit & Copyright: Josep M. Drudis & Don Goldman Explanation: The Great Nebula in Orion, an immense, nearby starbirth region, is probably the most famous of all astronomical nebulas. Here, glowing gas surrounds hot young stars at the edge of an immense interstellar molecular cloud only 1500 light-ye...
This view from NASA’s Juno spacecraft captures colorful, intricate patterns in a jet stream region of Jupiter’s northern hemisphere known as “Jet N3.” Jupiter’s cloud tops do not form a simple, flat surface. Data from Juno helped scientists discover that the swirling bands in the atmosphere extend deep into the planet, to a dept...
This image of star trails was compiled from time-lapse photography taken by NASA astronaut Christina Koch from aboard the International Space Station, taken in July 2019. This composite image was made from more than 400 individual photos taken over a span of about 11 minutes as the station traveled from Namibia toward the Red Sea. The image includes many nat...
2019 October 29 Curiosity Rover Finds a Clay Cache on Mars Image Credit: NASA, JPL-Caltech, MSSS Explanation: Why is there clay on Mars? On Earth, clay can form at the bottom of a peaceful lake when specific minerals trap water. At the pictured site on Mars, the robotic rover Curiosity drilled into two rocks and found the highest concentration of clay yet. T...
今年，南极上空的臭氧空洞在9月8日达到了峰值，面积为630万平方英里（约合1640万平方公里），在此之后呈现下降趋势。2019年南极上层大气的异常天气模式极大地限制了臭氧的消耗。 图片来源：NASA 10月21日，美国航空航天局（NASA）和美国国家海洋和大气管理局（NOAA）的科学家发布报告称，在9月和10月，南极上层大气异常的气候模式极大地限制了臭氧的消耗，这让观测到的臭氧空洞面积自1982年以来达到了最小值。 依据NASA和NOAA的卫星测量结果，2019年臭氧空洞在9月8日达到了630万平方英里（约合1640万平方公里）的峰值，然后在9月和10月的剩余时间内，这一面积缩小到了不足390万平方英里（约合1000万平方公里）。在天气状况正常的年份中，在9月下旬或10月初，臭氧空洞的最大面积通常会增长到大约8...
2019 October 28 The Space Station Crosses a Spotless Sun Image Credit & Copyright: Eduardo Schaberger Poupeau Explanation: Typically, the International Space Station is visible only at night. Slowly drifting across the night sky as it orbits the Earth, the International Space Station (ISS) can be seen as a bright spot about once a month from many locatio...