Zeynep Aksan, Dilek Çelikler. Mental Models Regarding the Concepts of “Space,” “Universe” and “Galaxy” Among Secondary School Students. Elementary Education Online [Internet]. 2023 Dec. 13 [cited 2024 Dec. 22];18(3):1131-40. Available from: https://ilkogretim-online.org/index.php/pub/article/view/1352