チャレンジャー爆ばく発はつ事じ故こじ字FuriganaMeanings1nounSpace Shuttle Challenger disaster; Challenger explosioneventRefers specifically to the January 28, 1986 event. Used in news, historical, and technical contexts.チャレンジャー爆ばく発はつ事じ故こは1986年ねん1月がつ28日にちに発はっ生せいした。The Space Shuttle Challenger disaster occurred on January 28, 1986.