THE EVOLUTION OF PLANETARY NEBULAE(PN) AND FADING TIME ACCORDING TO SYNTHETIC MODEL. Iraqi Journal of Science, [S. l.], v. 53, n. 1, p. 209–214, 2024. DOI: 10.24996/. Disponível em: https://www.ijs.uobaghdad.edu.iq/index.php/eijs/article/view/12670.. Acesso em: 2 aug. 2025.