Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
은하면은 우리 은하의 중심을 가로지르는 평면입니다.eunhamyeoneun uri eunha-ui jungseung-eul garojineun pyeongmyeonimnida.The galactic plane is the plane that crosses the center of our galaxy.