宇う宙ちゅう天てん気き

noun

space weather

Technical term in astronomy and space science referring to conditions on the Sun, in the solar wind, and in Earth's magnetosphere, ionosphere, and thermosphere.

• 宇う宙ちゅう天てん気き予よ報ほうは、人じん工こう衛えい星せいの運うん用ように重じゅう要ようだ。

  Space weather forecasts are important for satellite operations.