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
소위성은 작은 천체로, 행성 주위를 돌고 있습니다.sowi-seong-eun jag-eun cheonche-ro, haengseong ju-ui-reul dolgo issseubnida.A moonlet is a small celestial body that orbits a planet.