noun
meteor shower
Astronomical term for a meteor shower. Used in both scientific and everyday contexts.
今夜は流星雨が見られるかもしれない。
We might be able to see a meteor shower tonight.
ペルセウス座流星雨は毎年8月にピークを迎える。
The Perseid meteor shower peaks every August.
流星 means 'meteor' or 'shooting star', referring to a single meteor, whereas 流星雨 refers to a shower of many meteors.
Compound of 流星 (meteor) and 雨 (rain), literally 'meteor rain'. The reading りゅうせいう is the standard on'yomi reading of the kanji.