Rakhmadi, Arwin Juli, Observatorium Ilmu Falak Universitas Muhammadiyah Sumatera Utara, Indonesia

• Vol 3, No 1 (2020) - Articles
  Measuring the Apparent Magnitude of Planet Mars on August 1st and October 2nd, 2018 at the Falak Observatory at Muhammadiyah University of North Sumatera
  Abstract  PDF