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.
As the angle goes further out in distance from the muzzle, that angle measurement is always 1 MOA. Yep, even going out 100 yards, 1000 yards, or 1000 light years, 1 MOA is 1 MOA is 1 MOA. It never changes. What does change is the red distance between the two blue lines that make up the 1 MOA angle.