巴西的新月形沙丘

巴西的新月形沙丘

ByNASA中文

Former NASA astronaut Jack Fischer captured this photograph of Lagoa dos Barros and crescent-shaped barchan dunes on the Atlantic coastline of southern Brazil on July 9, 2017, while aboard the International Space Station. Barchan dunes are sand dunes that form in areas with one wind direction and little vegetation. In this case, fierce winds from the Western Atlantic sculpt the sand along the coast into distinctive crescent shapes. The tips of barchan dunes point downwind, showing the prevailing wind direction. These fragile formations act as barriers keeping the wind and waves from penetrating inland, blunting the effect of storms and minimizing coastal erosion. See more photos of Earth taken from space. Image Credit: NASA/ Jack Fischer 2017年7月9日，前NASA宇航员杰克·菲舍尔在国际空间站上拍摄了这张巴西南部大西洋海岸线上的拉戈亚·多斯·巴罗斯和新月形沙丘的照片。 新月形沙丘是在单一风向和植被稀少的地区形成的沙丘。在这种情况下，来自西大西洋的强风将海岸的沙子塑造成独特的新月形。新月形沙丘的尖端指向下风，表明盛行风向。这些脆弱的地层充当屏障，阻止风和海浪穿透到内陆，减弱风暴的影响，最大限度地减少海岸侵蚀。 查看更多从太空拍摄的地球照片。 图片来源: NASA/ Jack Fischer

一条巨龙腾空而上

一条巨龙腾空而上

ByNASA中文

In this long exposure photo from June 5, 2023, a SpaceX Falcon 9 rocket creates a beam of light as it launches from Kennedy Space Center in Florida. The 28th commercial resupply mission of the Cargo Dragon spacecraft brought new science investigations, food, supplies, and equipment to the International Space Station, including IROSAs (International Space Station Roll Out Solar Arrays) that will help provide a 30% increase in power for space station research and operations once installed. Image Credit: NASA/Frank Michaux 在这张摄于2023年6月5日的长曝光照片中，SpaceX猎鹰9号火箭从佛罗里达州肯尼迪航天中心发射时产生了一束光。货运龙飞船的第28次商业补给任务为国际空间站带来了新的科学调查、食品、物资和设备，包括IROSAs（国际空间站展开太阳能电池阵列），一旦安装，将有助于为空间站研究和运行提供30%的电力。 影像来源：NASA/Frank Michaux

太空漫步者伍迪·霍伯格驾驶着加拿大2号机械臂

太空漫步者伍迪·霍伯格驾驶着加拿大2号机械臂

ByNASA中文

During a spacewalk on June 9, 2023, NASA astronaut and Expedition 68 Flight Engineer Woody Hoburg rides the Canadarm2 robotic arm while maneuvering a roll-out solar array toward the International Space Station’s truss structure 257 miles above the Pacific Ocean. In the rear, is the SpaceX Dragon crew vehicle that docked to the Harmony module’s forward port on March 3 carrying four SpaceX Crew-6 crew members. The spacewalk with astronauts Steve Bowen and Woody Hoburg of NASA lasted 6 hours and 3 minutes. This was the ninth spacewalk for Bowen and the first for Hoburg. Image Credit: NASA/Frank Rubio 在2023年6月9日的一次太空行走中，NASA宇航员和第68号远征队飞行工程师伍迪·霍伯格驾驶着加拿大手臂2号机械臂，同时操纵着一个展开的太阳能电池阵列，朝着太平洋上空257英里处的国际空间站桁架结构飞行。后面是SpaceX的载人龙飞船，它于3月3日与和谐号节点舱的前端对接，载有四名SpaceX Crew-6机组人员。 NASA宇航员史蒂夫·鲍恩和伍迪·霍伯格的太空行走持续了6小时3分钟。这是鲍恩的第九次太空行走，也是霍伯格的第一次太空行走。 图片来源: NASA/Frank Rubio

在阴天中对接

在阴天中对接

ByNASA中文

The last rays of an orbital sunset illuminate the cloud tops above the Pacific Ocean off the coast of Japan, providing a dramatic background for the SpaceX CRS-28 Dragon cargo craft as it approached the International Space Station for docking on June 6, 2023. The uncrewed Dragon spacecraft carried scientific experiments and technology demonstrations, including studies of plant adaptation to stress and genetic structures called telomeres and deployment of satellite projects designed by students in Canada. Image credit: NASA 2023年6月6日，轨道日落的最后一道光线照亮了日本海岸外太平洋上空的云顶，为SpaceX公司的CRS-28龙货运飞船接近国际空间站进行对接提供了一个戏剧性的背景。 无人驾驶的龙飞船进行了科学实验和技术演示，包括研究植物对压力的适应和被称为端粒的遗传结构，以及部署由加拿大学生设计的卫星项目。 影像来源：NASA

Crew-5参观NASA总部

Crew-5参观NASA总部

ByNASA中文

On June 5, 2023, Crew-5 astronauts Josh Cassada (left) and Nicole A. Mann (second from left) of NASA, and Japan Aerospace Exploration Agency (JAXA) astronaut Koichi Wakata (right) visited NASA Associate Administrator Bob Cabana (second from right) at NASA Headquarters in Washington. Mann, Cassada, and Wakata spent 157 days in space as part of Expedition 68 aboard the International Space Station. While aboard, the astronauts worked on experiments related to heart disease, 3D printing human tissue, and fluid behavior in microgravity. Watch Crew-5 talk about their five-month mission. Image Credit: NASA/Joel Kowsky 2023年6月5日，NASA Crew-5宇航员乔希·卡萨达（左）和妮可·A·曼（左二），日本宇宙航空研究开发机构（JAXA）宇航员若田光一（右）在NASA总部拜访了美国宇航局副局长鲍勃·卡巴纳（右二）。 作为国际空间站第68号远征队的一部分，曼恩、卡萨达和若田在太空中度过了157天。在太空中，宇航员们进行了与心脏病、3D打印人体组织和微重力下的流体行为有关的实验。 观看Crew-5谈论他们为期五个月的任务。 影像来源：NASA/Joel Kowsky

太空中的花朵

太空中的花朵

ByNASA中文

This colorful zinnia, shown in an image from Jan. 22, 2016, grew aboard the International Space Station as part of the VEG-01 experiment. This investigation assessed the on-orbit function and performance of the Veggie facility, focusing on the growth and development of seedlings in the spaceflight environment and the composition of microbial flora on the plants and the facility. For this run, zinnias were grown for 60 days and produced flowers. Learn more about the Veggie facility and other ways NASA grows plants in space. Image Credit: NASA/Scott Kelly 2016年1月22日的一张图片显示了这种五颜六色的百日草，作为VEG-01实验的一部分，它生长在国际空间站上。这项调查评估了Veggie设施的在轨功能和性能，重点研究了幼苗在航天环境下的生长发育以及植物和设施上微生物菌群的组成。在这次试验中，百日草被种植了60天，并开出了花朵。 了解更多关于Veggie设施和NASA在太空中种植植物的其他方法。 图片来源: NASA/Scott Kelly

2021年度灾难：回顾

2021年度灾难：回顾

ByNASA中文

In 2021, Hurricane Ida left over 1 million people without power, tornadoes tore across the American Midwest, volcanoes forced people to evacuate their homes, wildfires covered the American West and unusual flooding wreaked havoc on Central Europe. 2021年，飓风艾达导致100多万人断电，龙卷风席卷美国中西部，火山爆发迫使人们撤离家园，野火覆盖美国西部，罕见的洪水对中欧造成严重破坏。 Some characteristics of natural hazards, such as hurricanes, floods and wildfires, have been historically predictable and have informed disaster preparation. However, with human emissions of greenhouse gases increasing Earth’s temperature, we’re seeing changes in those characteristics: wildfire and drought seasons are lengthening, hurricanes and rainfall are becoming more intense, and coastal flooding is increasing. 自然灾害的一些特征，如飓风、洪水和野火，在历史上是可以预测，并为备灾提供了信息。然而，随着人类排放的温室气体使地球温度升高，我们正在看到这些特征的变化：野火和干旱季节正在延长，飓风和降雨变得更加强烈，沿海洪水也正在增加。 By sponsoring application science and fostering domestic and international partnerships, the NASA Disasters program seeks to use its Earth observation data to enable disaster-resilient communities in a changing climate. 通过资助应用科学和培育国内和国际伙伴关系，NASA灾难项目寻求利用其地球观测数据，使社区能够在不断变化的气候中抵御灾害。 For details…