Light Pollution Monitoring Through Zenithal Sky Brightness at Selected Malaysian Observatories von Bely, Ahmad Hariz, Umar, Roslan, Sabri, Nor Hazmin, Abidin, Zamri Zainal, Nasir, Ahmad Lutfi Afifi Mohamad, Ismail, Ihsanuddin, Hussaini, Razalie, Zulkifli, Emma Zulaiha, Rakhmadi, Arwin Juli

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The contribution of Abdul Raouf Al-Sinkaili (d.1693) to Astronomy and Calender (the Study of Philology of book entitled "Risalah fi at-Taqwim" von Rakhmadi, Arwin Juli, Akrim, Akrim, Syafruddin, Masykur

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Understanding the effect of revolution and rotation of the earth on prayer times using accurate times von Raisal, Abu Yazid, Rakhmadi, Arwin Juli

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KONTRIBUSI SYAIKH MUHAMMAD THAHIR JALALUDDIN DALAM BIDANG ILMU FALAK von Butar-Butar, Arwin Juli Rakhmadi

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Tolerance and Moderation in the Formulation of A Global Islamic Calendar von Qorib, Muhammad, Rakhmadi, Arwin Juli

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QIBLA ACCURARY OF THE MAHLIGAI AND PAPAN TINGGI TOMB COMPLEXES AT CENTRAL TAPANULI von Rakhmadi, Arwin Juli, Junaidi, Junaidi

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HISTORIOGRAFI ILMU FALAK DI NUSANTARA: Sejarah, Motivasi dan Tokoh Awal von Rakhmadi Butar-Butar, Arwin Juli

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The feasibility study of Barus city as the new astrotourism destination from astronomical and meteorological aspect von Butar-Butar, Arwin Juli Rakhmadi, Putra, Singgih Prana, Hidayat, Muhammad, Putraga, Hariyadi

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Understanding the Evolutionary Track of Tau Sco von Putra, Singgih Prana, Butar-Butar, Arwin Juli Rakhmadi, Putraga, Hariyadi, Hidayat, Muhammad

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KAJIAN ILMU FALAK DI INDONESIA: Kontribusi Syaikh Hasan Maksum dalam Bidang Ilmu Falak von Rakhmadi Butar-Butar, Arwin Juli

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PENGEMBANGAN MEDIA AJAR LUBANG HITAM MENGGUNAKAN MODEL PENGEMBANGAN ADDIE von Setiawan, Hasrian Rudi, Rakhmadi, Arwin Juli, Raisal, Abu Yazid

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QIBLA ACCURARY OF THE MAHLIGAI AND PAPAN TINGGI TOMB COMPLEXES AT CENTRAL TAPANULI von Arwin Juli Rakhmadi, Junaidi Junaidi

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Pengukuran Tingkat Polusi Cahaya dan Awal Waktu Subuh di OIF UMSU dengan Menggunakan Sky Quality Meter von Rakhmadi, Arwin Juli, Setiawan, Hasrian Rudi, Raisal, Abu Yazid

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Empowering Astronomical Exploration: Advancement of New Moon Observation Devices in Sarawak, Malaysia von Bely, Ahmad Hariz, Nasir, Ahmad Lutfi Afifi Mohd, Umar, Roslan, Chik, Wan Mohd Yusof Wan, Husaini, Razalie, Othman, Mohamad Shobri, Rakhmadi, Arwin Juli

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PENENTUAN WAKTU MALAM MENGGUNAKAN SKY QUALITY METER DENGAN PENDEKATAN MOVING AVERAGE von Putraga, Hariyadi, Rakhmadi, Arwin Juli, Hidayat, Muhammad, Firdaus, Muhammad Dimas

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PENGEMBANGAN MEDIA AJAR LUBANG HITAM MENGGUNAKAN MODEL PENGEMBANGAN ADDIE von Hasrian Rudi Setiawan, Arwin Juli Rakhmadi, Abu Yazid Raisal

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PENGEMBANGAN MEDIA AJAR LUBANG HITAM MENGGUNAKAN MODEL PENGEMBANGAN ADDIE von Hasrian Rudi Setiawan, Arwin Juli Rakhmadi, Abu Yazid Raisal

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آراء ابن المجدي (ت 850 هـ) في رؤية الهلال دراسة وتحقيق قطاع من كتابه "غنية الفهيم والطريق إلى حل التقويم"... von Arwin Juli Rakhmadi, Qorib, Muhammad, Zailani, Zailani, Radiman, Radiman, Amrizal, Amrizal

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The Effect of the Installation Angle of the Sky Quality Meter on the Night Sky Brightness and the Beginning of the Fajr Prayer Time von Raisal, Abu Yazid, Hidayat, Muhammad, Hermawan, Leo, Rakhmadi, Arwin Juli

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Measuring the Apparent Magnitude of Planet Mars on August 1st and October 2nd, 2018 at the Falak Observatory at Muhammadiyah University of North Sumatera von Hidayat, Muhammad, Rakhmadi, Arwin Juli, Raisal, Abu Yazid

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