地球

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冰川在运动:卫星拍摄到了冰川数十年的变化

从太空中拍摄到的地球冰川和冰原的新延时视频——有些已有近50年历史——为科学家提供了了解地球冰冻区域变化的新视角。 从太空中拍摄的地球冰川和冰原的新延时视频跨越了近50年,为科学家们提供了了解地球冰冻区域变化的新视角。 来源:NASA / Matt Radcliff 在12月9日于旧金山举行的美国地球物理联合会年会上的一次新闻发布会上,科学家使用来自包括NASA-U.S. 地球资源探测卫星(Landsat)任务在内的卫星数据发布了阿拉斯加,格陵兰和南极洲的新时间序列图像。一系列的图片说明了阿拉斯加冰川的巨大变化,并可能警告未来哈伯德冰川的消退。在格陵兰岛,不同的卫星记录显示,从2000年开始, […]

NASA·每日一图

地球变化中的冰川

Meltwater lakes form on the surface of Greenland’s Petermann Glacier, seen here in a June 2019 Landsat image. A new study finds that the number – and elevation – of meltwater lakes in Greenalnd is increasing. How do scientists know? Earth’s glaciers and ice sheets as seen from space – some spanning

资讯

截至2030年,地球上的海平面将上升多少?

Jason-CS/Sentinel-6任务将追踪海平面上升,这将是未来10年全球变暖最明显的迹象之一。该任务由两颗卫星组成,上图中是第一颗卫星Sentinel-6A正在位于德国的洁净室里进行展示,该卫星计划于2020年11月发射。 版权:德国工业设备管理公司(IABG) 地球上的气候正在发生改变,而关于海洋的研究对于理解气候变化对未来的影响至关重要。美国和欧洲正准备发射Sentinel-6/Jason-CS卫星,以继续研究全球变暖最明显的迹象 – 海平面上升。该卫星将在轨道上运行10年,将是持续时间最长的任务。Sentinel-6/Jason-CS任务(Jason-Continui

天文·每日一图

水星凌日

2019 November 10 A Mercury Transit Sequence Image Credit & Copyright: Dominique Dierick Explanation: Tomorrow — Monday — Mercury will cross the face of the Sun, as seen from Earth. Called a transit, the last time this happened was in 2016. Because the plane of Mercury’s orbit

NASA·每日一图

从空间站观测加利福尼亚的野火

From the vantage point of space aboard the International Space Station, NASA astronaut Andrew Morgan captured this image of a California wildfire. On his Facebook page, he said: “From the International Space Station I was able to catch these pictures of the California wildfires burning north o

天文·每日一图

星际空间的地球

2019 October 12 Interplanetary Earth Cassini Imaging Team, SSI, JPL, ESA, NASA & NASA/JHU Applied Physics Lab/Carnegie Inst. Washington Explanation: In an interplanetary first, on July 19, 2013 Earth was photographed on the same day from two other worlds of the Solar System, innermost planet Mer

NASA·每日一图

卫星从太空捕捉到四个热带气旋

On Sept. 4, 2019, a loose chain of tropical cyclones lined up across the Western Hemisphere. At the time of this image (1:10 p.m. EDT) Hurricane Juliette in the East Pacific and Hurricane Dorian in the Atlantic were both category 2 storms. Meanwhile, Tropical Storm Fernand packed sustained winds of

NASA·每日一图

从国际空间站上看到的飓风多里安

NASA astronaut Christina Koch snapped this image of Hurricane Dorian as the International Space Station during a flyover on Monday, September 2, 2019. The station orbits more than 200 miles above the Earth. Image Credit: NASA 2019年9月2日,星期一,美国宇航局宇航员克里斯蒂娜·科赫在国际空间站上空拍摄了多里安飓风的照片。空间站绕地球200多英里的轨道运行。 图片来源:

天文·每日一图

告别地球

2019 August 25 Leaving Earth Video Credit: NASA/JHU Applied Physics Lab/Carnegie Inst. Washington Explanation: What it would look like to leave planet Earth? Such an event was recorded visually in great detail by the MESSENGER spacecraft as it swung back past the Earth, eight years ago, on its way i

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