A study using data on cloud cover taken from satellite images dating from 1979 found that 65% of the world's skies were covered by cloud when cosmic rays were weakest and 68% when they were strongest.
A study using data on cloud cover taken from satellite images dating from 1979 found that 65% of the world's skies were covered by cloud when cosmic rays were weakest and 68% when they were strongest.
研究从1979年起卫星云图所示云量的数据，发现宇宙射线最弱时，全球空中65%的面积被云层覆盖；最强时这一数字为68%.