北非上空云层密布

As the International Space Station orbited 259 miles above North Africa, swirls of clouds covered the sky. To the bottom right of the image, one of the station’s roll-out solar arrays peeks through. Astronauts aboard the space station see 16 sunrises and sunsets per day due to their high orbital velocity—17,500 miles per hour. In the more than 20 years that people have been living aboard the station, it has circumnavigated Earth tens of thousands of times.
Image Credit: NASA

当国际空间站在北非上空259英里的轨道上运行时，天空布满了漩涡状的云。在图像的右下方，空间站的太阳能电池阵列隐约可见。由于轨道速度很高(17500英里/小时)，空间站上的宇航员每天能看到16次日出和日落。在人们居住在空间站的20多年里，它已经绕地球飞行了数万次。
影像来源：NASA