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.
Rancid Coolaid wrote: To each, his own. The primary benefit of the mil over the MOA is consistency. For your MOA scope, a 1MOA correction is 4 clicks at 100 yards but only 2 clicks at 200 yards. For a mil-based turret, a 2-mil correction is a 2-mil correction, no matter what range. I learned on mil dot scopes with MOA turrets and can do it just fine, but I must admit mil-based systems are simpler.