Formulae. 1  Eclipsing binary: diameter = speed Ã time of eclipse. 2  Size from luminosity: star's radius/Sun's radius = (Sun's temperature/star's temperature)2 Sqrt[star's luminosity/Sun's luminosity].
MOA is a mathmatical concept that most firearm scopes incorporate. Minute of Angle (MOA) is critical to sighting in your scope. MOA mathematical concepts were used to develop the AccuScope scope sighting reference tool. The only MOA information needed to use AccuScope is your scope's MOA number.
Re: MRAD and MOA scope adjustments, please educate me. Easier to describe it on the phone. For most people without a Military or LEO background with optics, MOA is usually easier. One is not BETTER than the other. MOA is a finer subtension, and it is my preferred way to reticle range and do distance shooting.