ASTRONOMY BASICS: WHAT ARE ARC MINUTES AND ARC SECONDS?
34:44
NINA Tutorial - How to PLATE SOLVE and Set Up an Imaging Session
24:18
Telescope Resolution, FWHM, and HFR
6:03
Astro Tutorial #1.12: What is "seeing"?
13:36
What exposure time should I use?! Let's answer that!
16:46
Autocollimators 1: Introduction
6:44
Astronomy - Chapter 1: Introduction (7 of 10) How to Measure Angular Size?
6:09
PARSECS, Light Years, or AU? (Astronomy)
21:41