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On the northwestern coast of Madagascar, the salty waters of the Mozambique Channel penetrate inland to join with the freshwater outflow of the Betsiboka River, forming Bombetoka Bay. Numerous islands and sandbars have formed in the estuary from the large amount of sediment carried in by the Betsiboka River and have been shaped by the flow of the river and the push and pull of tides. Learn more about Bombetoka Bay, Madagascar. Fifty years ago, on April 22, 1970, people around the world marked the first Earth Day. On this Earth Day, as we physically separate ourselves by necessity, we can still collectively appreciate the wondrous beauty of our planet and the extraordinary science that helps us understand how it all works – and we…

The Soyuz MS-16 lifts off from Site 31 at the Baikonur Cosmodrome in Kazakhstan on Thursday, April 9, 2020, sending Expedition 63 crewmembers Chris Cassidy of NASA and Anatoly Ivanishin and Ivan Vagner of Roscosmos into orbit for a six-hour flight to the International Space Station and the start of a six-and-a-half month mission. Image Credit: NASA/GCTC/Andrey Shelepin 2020年4月9日星期四，联盟号MS-16从哈萨克斯坦拜科努尔航天发射场31号发射升空，将第63号远征队成员——NASA的克里斯·卡西迪(Chris Cassidy)、俄罗斯宇航局(Roscosmos)的阿纳托利·伊瓦尼辛(Anatoly Ivanishin)和伊万·瓦格纳(Ivan Vagner)送入轨道，进行前往国际空间站的六小时飞行，并开始为期六个半月的任务。 图片来源:NASA/GCTC/Andrey Shelepin

Aboard the International Space Station, NASA astronaut Jessica Meir conducts cardiac research inside the Life Sciences Glovebox, a biology research facility located in Japan’s Kibo laboratory module. The Engineered Heart Tissues investigation explores cardiac function in weightlessness, which may provide new drug developments for astronauts and Earthlings. #WorldHealthDay Image Credit: NASA 在国际空间站上，美国宇航局宇航员杰西卡·梅尔在生命科学手套箱内进行心脏研究。生命科学手套箱是位于日本希望号实验舱的生物研究设施。工程心脏组织研究探索了失重状态下的心脏功能，这可能为宇航员和地球人提供新的药物开发。 #WorldHealthDay 图片来源：NASA

A SpaceX Dragon cargo spacecraft lifted off on its way to the International Space Station after launching at 11:50 p.m. EST Friday, March 6. The spacecraft launched on a Falcon 9 rocket from Space Launch Complex 40 at Cape Canaveral Air Force Station in Florida and arrived at the orbital outpost on Monday, March 9. Dragon joins three other spacecraft currently at the station. NASA astronauts Jessica Meir and Andrew Morgan grappled Dragon, which is scheduled to remain at the space station until April 9, when the spacecraft will return to Earth with research and cargo. ​Dragon was successfully berthed to the Node 2 Nadir port. Image Credit: NASA/KSC 美国东部时间3月6日晚11点50分，SpaceX公司的“龙”货运飞船发射升空，前往国际空间站。飞船由猎鹰9号火箭从佛罗里达州卡纳维拉尔角空军基地的航天发射场40号发射升空，于3月9日星期一抵达国际空间站。 龙飞船加入了目前在空间站的另外三艘飞船。NASA的宇航员杰西卡·梅尔和安德鲁·摩根捕获了龙飞船。按计划，龙飞船至4月9号都将停留在空间站，届时龙飞船将带着研究和货物返回地球。龙飞船成功停泊在Node 2 Nadir端口上。 图片来源：NASA / KSC

NASA astronaut and International Space Station Expedition 62 crew member Jessica Meir configures the Light Microscopy Module inside the Fluids Integrated Rack, as part of the Advanced Colloids Experiment-Temperature-4 (ACE-T-4) investigation. Want your chance to work on exciting, cutting-edge science in space? NASA is looking for its next generation of astronauts. Learn more: #BeAnAstronaut: NASA Seeks Applicants to Explore Moon, Mars​. Image Credit: NASA 作为高级胶体实验温度4（ACE-T-4）研究的一部分，NASA宇航员和国际空间站第62号远征队机组成员杰西卡·梅尔（Jessica Meir）在流体集成机架内配置了光学显微镜模块。 希望您有机会从事激动人心的前沿科学吗？ NASA正在寻找其下一代宇航员。了解更多：#BeAnAstronaut：NASA寻求申请人探索火星月球。 图片来源：NASA

NASA astronaut Christina Koch is seen outside the Soyuz MS-13 spacecraft after she, Roscosmos cosmonaut Alexander Skvortsov, and European Space Agency astronaut Luca Parmitano landed in a remote area near the town of Zhezkazgan, Kazakhstan on Thursday, Feb. 6, 2020. Koch returned to Earth after logging 328 days in space — the longest spaceflight in history by a woman — as a member of Expeditions 59-60-61 on the International Space Station. Skvortsov and Parmitano returned after 201 days in space where they served as Expedition 60-61 crew members onboard the station. Image Credit: NASA/Bill Ingalls 2020年2月6日，周四，俄罗斯太空局宇航员亚历山大·斯科沃佐夫和欧洲航天局宇航员卢卡·帕尔米塔诺在哈萨克斯坦哲兹卡兹根镇附近的一个偏远地区着陆后，在联盟号MS-13宇宙飞船外看到了宇航员克里斯蒂娜·科赫。作为国际空间站第59、60、61号远征队的一员，科赫在太空中飞行了328天——这是女性历史上最长的太空飞行——之后返回地球。斯克沃尔佐夫和帕尔米塔诺作为国际空间站第60、61号远征队的一员在太空中飞行201天后返回。 图片来源：NASA/Bill Ingalls

NASA astronaut Christina Koch is set to return to Earth on Thursday, Feb. 6, after 328 days living and working aboard the International Space Station. Her mission is the longest single spaceflight by any woman, which is helping scientists gather data for future missions to the Moon and Mars. Learn how her mission is helping scientists plan for future long-duration missions. Image Credit: NASA NASA宇航员克里斯蒂娜·科赫将于2月6日星期四返回地球，此前她在国际空间站生活和工作了328天。她的任务是所有女性中最长的一次太空飞行，帮助科学家为未来的月球和火星任务收集数据。 了解她的任务是如何帮助科学家计划未来的长期任务。 图片来源:NASA

European Space Agency astronaut and International Space Station commander Luca Parmitano finalizes repairs to the Alpha Magnetic Spectrometer. The instrument, which detects a dark matter and antimatter, was repaired during a spacewalk on Jan. 25, 2020, that lasted 6 hours and 16 minutes. Image Credit: NASA 欧洲航天局宇航员、国际空间站指挥官卢卡·帕尔米塔诺完成阿尔法磁谱仪的修理工作。探测暗物质和反物质的仪器在2020年1月25日的太空行走中进行了修复，历时6小时16分钟。 图片来源:NASA