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|+THE SUN |- ||Volume (Earth's = 1), ||1,415,225 |- ||Mass (Earth's = 1), ||354,936 |- ||Density (Earth's = 1), ||0.2543 |- ||Diameter (Earth's = 1), ||111.454 |- ||Diameter— — — in miles, ||882,646 |- ||Diameter— — —apparent, mean, ||32′ 12″.6 |- ||Gravity at equator (Earth's = 1), ||28 |- ||In one second of time bodies fall, in feet, ||335 |- ||Period of rotation in days, ||25.5 |- ||Zone of maximum spots north from the equator, ||11°—15° |- ||Usual limit of spots from the equator, ||33° |- ||Period of maximum number of spots, in years, ||10 |- ||Diameter of maximum spot (Sun's = 1), ||0.05 |- ||Breadth of zone of drift, at equator, direction of rotation, ||30° |- ||Breadth of zone of drift,„ in each hemisphere, opposite direction, ||30° |- ||Light of the Sun (light of star of 1st Mag. = 1), ||108,000,000,000 |- ||Intensity of Sun's light (electric light = 1), ||4 |- ||Intensity of Sun's light— — — : (wax candle = 1), ||15,000 |- ||Heat of each square foot of surface, mechanical effect, in horse-power, ||7,000 |- ||Heat of each square foot of surface, equal the combustion of cwts. of coals per hour, ||13.5 |- ||Heat of each square foot of surface, equal 5 lbs. matter falling with velocity per second, in miles, ||390 |- ||Heat at centre of disc (heat at border = 1), ||2 |- ||Diameter of largest spots, in miles, ||50,000 |- ||Number of strata in atmosphere, ||4 |- ||Spots seen to rotate on their axis (in days), about ||18 |- ||Heat equivalent to loss of mechanical force by Mercury falling into Sun (a year's heat of Sun = 1), ||3 |- ||Velocity of bodies near the Sun (miles per second), about ||400 |- ||Point in Hercules to which the Sun is advancing, declination 35° N., right ascension, ||250° |}