保护地球，探索宇宙，发现文明
On Oct. 13, 2022, NASA’s Lucy spacecraft captured this image of the Earth and the Moon from 890,000 miles (1.4 million km) away. The image was taken as part of an instrument calibration sequence as the spacecraft approached Earth for its first of three Earth gravity assists. These Earth flybys provide Lucy with the speed required to reach the Trojan asteroid...
Our Operational Land Imager-2 on Landsat 9 acquired this vibrant image of deciduous trees and conifers in the Adirondack Mountains in northeast New York on Oct. 8, 2022. Adirondack Park, the largest state park in the contiguous United States, puts on a reliable show of seasonal color. Deciduous trees with especially vivid hues include sugar and red maples, a...
十月份的天空会发生什么？夜晚有巨行星，火星改变方向，来自猎户座的流星。
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’...
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,...
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...
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。
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...
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 ...
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...