dorothy-hanks documents

Star Properties. Apparent Magnitude System of Hipparchus Group of brightest stars1 m Stars about ½ as bright as 1 m 2 m Stars about ½ as bright as 2 m
Documents Star Properties. Apparent Magnitude System of Hipparchus Group of brightest stars1 m Stars about ½ as bright as 1 m 2 m Stars about ½ as bright as 2 m