8:08 Astro Tutorial # 1.6: THE F-RASIO "cepat" vs "lambat" lingkup catchingphotons37 rb kali ditonton
9:23 Astro Tutorial # 1.4: Sistem Koordinat dari langit malam - ALT / AZ vs RA / Desember catchingphotons21 rb kali ditonton
7:49 Astro Tutorial # 1,13: Visual Astronomi vs Astrophotorgraphy catchingphotons7,5 rb kali ditonton
