保护地球，探索宇宙，发现文明
The Surface Water and Ocean Topography (SWOT) spacecraft is seen in this early morning photo from Dec. 14, 2022, as preparations for launch continued. SWOT, the first satellite mission that will observe nearly all water on Earth’s surface, launched on Dec. 16. Jointly developed by NASA and Centre National D’Études Spatiales, with contributions from the Canad...
地表水和海洋地形卫星上的摄像机拍摄到了其主要科学仪器在轨道上展开的天线。
A SpaceX Falcon 9 rocket with the Surface Water and Ocean Topography (SWOT) spacecraft onboard is seen as it rolls out to the pad, Tuesday, Dec. 13, 2022, at Space Launch Complex 4E at Vandenberg Space Force Base in California. Jointly developed by NASA and Centre National D’Etudes Spatiales, with contributions from the Canadian Space Agency and the Un...
2022年9月26日 All the Water on Planet Earth Illustration Credit: Jack Cook, Adam Nieman, Woods Hole Oceanographic Institution; Data source: Igor Shiklomanov Explanation: How much of planet Earth is made of water? Very little, actually. Although oceans of water cover about 70 percent of Earth’s surface, these oceans are shallow compared to the Earth’...
一旦卫星进入轨道，SWOT任务不仅将定期监测像俄勒冈州威拉米特这样的强大河流（如图），而且还将监测直径至少330英尺(100米)的小河流。 影像来源：美国能源部 地表水和海洋地形任务将对地球上95%以上的湖泊、河流和水库进行测量。 水就是生命，但尽管水很重要，但人类对地球淡水体的看法却出奇地有限。研究人员对全球仅有的几千个湖泊进行了可靠的水位测量，而地球上一些重要的河流系统几乎没有数据。即将到来的地表水和海洋地形（SWOT）卫星将填补这一巨大空白。通过帮助人们更好地了解地球的水循环，它将有助于更好地管理水资源，并扩大对气候变化如何影响湖泊、河流和水库的知识。 由NASA和法国航天局国家空间研究中心（CNES）合作，加拿大航天局和英国航天局提供捐助，SWOT计划于11月从加利福尼亚州范登堡航天部队基地发射。工程师...
We’re celebrating 50 years of the Landsat satellite, the first of which launched on July 23, 1972. The latest in the series, Landsat 9, launched in September 2021. Landsat shows us Earth from space. For 50 years, the mission has collected data on the forests, farms, urban areas and freshwater of our home planet, generating the longest continuous record...
科学家们反复检查天气预报，为飞机的飞行做准备，并在最后一刻检查科学仪器。一场巨大的冬季风暴即将来临，但这正是这些追逐风暴的科学家们所希望的。 该团队正在NASA的两架飞机上追踪美国中西部和东部的风暴，这两架飞机配备了科学仪器，以帮助了解冬季风暴形成和发展的内部机制。该团队正在驾驶两架飞机调查冬季风暴，一架在风暴上方，一架在云层内。每个都配备了一套科学仪器，用于收集有关雪粒及其形成条件的数据。这些实验是NASA第二次部署大西洋海岸威胁风暴（IMPACTS）微物理和降水调查任务的一部分，该任务于1月开始，计划于2月底结束。 这些数据将帮助团队将雪粒及其环境的特性与大尺度过程联系起来，比如云层结构和降水模式，这些过程可以通过飞机和卫星上的遥感仪器看到。最终，IMPACTS团队对暴风雪的了解将改善气象模型，提高我们使用...
Much like the sky, rivers are rarely painted one color. Rivers around the world appear in shades of yellow, green, blue, and brown—and subtle changes in the environment can alter their colors. 就像天空一样，河流很少被涂成一种颜色。世界各地的河流呈现出黄色、绿色、蓝色和棕色的色调——环境的细微变化会改变它们的颜色。 New research shows the dominant color has changed in about one-third of large rivers in the continental U...
2022年1月15日 Galileo’s Europa Image Credit: NASA, JPL-Caltech, SETI Institute, Cynthia Phillips, Marty Valenti Explanation: Looping through the Jovian system in the late 1990s, the Galileo spacecraft recorded stunning views of Europa and uncovered evidence that the moon’s icy surface likely hides a deep, global ocean. Galileo’s Europa image d...
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, s...