恒こう星せい天てん文もん学がくこうせいてんもんがくMeanings1nounstellar astronomyThe branch of astronomy that studies stars, their properties, and their evolution.恒こう星せい天てん文もん学がくは、星ほしの一いっ生しょうを研けん究きゅうする分ぶん野やだ。Stellar astronomy is a field that studies the life cycle of stars.
