Observatorium Ilmu FalakUniversity of Muhammadiyah North Sumatra .
217 Denai St, Post Graduate Building 7th Floor, Medan City, Indonesia. Postal Code: 20226.
Hizami Sabil Universitas Muhammadiyah Sumatera Utara Indonesia
Universitas Muhammadiyah Sumatera Utara
Ilmu Falak '23
Alfath Khair Harefa Universitas Muhammadiyah Sumatera Utara Indonesia