銀ぎん河が宇う宙ちゅう線せん

noun

galactic cosmic rays; GCR

Technical term in astronomy for high-energy particles originating outside the solar system.

• 銀ぎん河が宇う宙ちゅう線せんは超ちょう新しん星せい爆ばく発はつなどで加か速そくされると考かんがえられている。

  Galactic cosmic rays are thought to be accelerated by events such as supernova explosions.