标签: 地球

地球所有的水

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’...

中国西部的雪山

European Space Agency astronaut Samatha Cristoforetti captured a photo of a portion of China’s Tanggula Mountains near Hala Lake as the International Space Station orbited 260 miles above the Earth on Sept. 5, 2022. Since the station began hosting human astronauts in November 2000, crew members have produced hundreds of thousands of images of the land,...

地中海城市照亮了夜晚

This nighttime photograph from the International Space Station (ISS) as it orbited 261 miles above Earth looks across the Mediterranean Sea from north Africa to southern Europe. The city lights of Algiers, Algeria to Tunis, Tunisia highlight Africa’s northern coast from the bottom center toward the upper right. From far left, the lights of city-state M...

观星指南(2022年9月)

九月份的天空会发生什么?火星在移动,木星的最佳观测时间,以及一个在秋分点寻找方位的巧妙方法。

地球近期的气候螺旋

2022年8月22日 Earth’s Recent Climate Spiral Video Credit: NASA’s Scientific Visualization Studio Explanation: Is our Earth warming? Compared to the past 250 million years, the Earth is currently enduring a relative cold spell, possibly about four degrees Celsius below average. Over the past 120 years, though, data indicate that the average global te...

告别地球

2022年8月9日 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 in 2005 on its way in toward the planet Mercury. Earth can be seen rotating in this time-lapse ...

冰雪星辰

Like distant galaxies amid clouds of interstellar dust, chunks of sea ice drift through graceful swirls of grease ice in the frigid waters of Foxe Basin near Baffin Island in the Canadian Arctic. Sea ice often begins as grease ice, a soupy slick of tiny ice crystals on the ocean’s surface. As the temperature drops, grease ice thickens and coalesces int...

汤加火山爆发将史无前例的水喷入平流层

这段循环视频显示了2022年1月15日洪加汤加洪加哈拜火山水下喷发产生的伞状云。GOES-17卫星拍摄了一系列图像,其中还显示了新月形冲击波和闪电。 影像来源:NASA Earth Observatory image by Joshua Stevens using GOES imagery courtesy of NOAA and NESDIS NASA的微波临边探测器探测到,大量的水蒸气涌入大气层,最终可能导致地球表面暂时变暖。 1月15日,亨加汤加-亨加-哈拜火山爆发,引发了一场席卷全球的海啸,并引发了环绕地球两周的音爆。南太平洋海底的火山喷发还向地球平流层喷射出巨大的水蒸气,足以填满58,000多个奥运会大小的游泳池。大量的水蒸气足以暂时影响地球的全球平均温度。 “我们从未见过这样的景象。”南加州NASA...

观星指南(2022.08)

八月份的天空会发生什么?拿起你的双筒望远镜来观测行星,展望英仙座,以及和天鹅座一起翱翔。