Identify the differences between ordinary and barred spiral galaxies, NGC 2649 and NGC 4662 for examples. Iraqi Journal of Science, [S. l.], v. 65, n. 10(SI), p. 6197–6204, 2024. DOI: 10.24996/ijs.2024.65.10(SI).25. Disponível em: https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/12525.. Acesso em: 18 dec. 2024.