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.
Ask most shooters to define minute of angle (MOA) and youâll probably elicit the reply, âItâs an inch at 100 yards.â A purist overhearing this will almost certainly chime in with a smug correction to the effect that a minute of angle is really 1.0471996 inches at 100 yards, but if youâre numerically challenged and ask nicely, you may round it off to ...