最終更新日：2025/11/21
The observatory cataloged a helium variable in the field, a star whose helium absorption lines vary with a strict rotational period.
正解を見る
The observatory cataloged a helium variable in the field, a star whose helium absorption lines vary with a strict rotational period.
音声機能が動作しない場合はこちらをご確認ください
編集履歴（0）
