Calculating the Variation of the Universal Parameter (Variable) Using Kepler’s Equation for Different Orbits. Iraqi Journal of Science, [S. l.], v. 66, n. 4, p. 1729–1736, 2025. DOI: 10.24996/ijs.2025.66.4.29. Disponível em: https://www.ijs.uobaghdad.edu.iq/index.php/eijs/article/view/12583.. Acesso em: 20 jul. 2025.