Page:Gods Glory in the Heavens.djvu/394

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 * +FIXED STARS.
 * Magnitude of the smallest stars visible,
 * 7th
 * stars visible by the most powerful telescopes,
 * 16th
 * Light of a star of the 6th magnitude (1st magnitude = 1),
 * 1-1OOth
 * Number of stars of 1st magnitude,
 * 24
 * 2d magnitude,
 * 50-60
 * 3d magnitude,
 * 200
 * total registered to 7th magnitude, about
 * 15,000
 * total visible in Herschel's 20-feet telescope,
 * 5,500,000
 * Rate at which light travels per second, in miles,
 * 200,000
 * Time required by light to traverse the distance of a star with one second of parallax, in years,
 * 3$y.$ 83$d.$
 * Corresponding distance in billions of miles,
 * 20
 * Distance of smallest stars seen in telescopes of 75 space penetrating power, measured by light in years,
 * 2,000
 * Star 61 Cygni, parallax first detected in it, by Bessel,
 * 0″.349
 * proper motion annually,
 * 5″
 * distance of component stars,
 * 15″
 * sum of masses of the component stars (Sun = 1),
 * 0.353
 * α Centauri, parallax,
 * 0″.9128
 * nearest star, distance measured by light, in years, about
 * 3.5
 * proper motion,
 * 4″
 * Number of stars to which parallax has been assigned,
 * 9
 * Probable average distance of stars of 1st magnitude, measured by light, in years,
 * 15.5
 * 2d magnitude,
 * 28
 * 3d magnitude,
 * 43
 * 4th magnitude,
 * 60
 * 5th magnitude,
 * 84
 * }
 * nearest star, distance measured by light, in years, about
 * 3.5
 * proper motion,
 * 4″
 * Number of stars to which parallax has been assigned,
 * 9
 * Probable average distance of stars of 1st magnitude, measured by light, in years,
 * 15.5
 * 2d magnitude,
 * 28
 * 3d magnitude,
 * 43
 * 4th magnitude,
 * 60
 * 5th magnitude,
 * 84
 * }
 * 43
 * 4th magnitude,
 * 60
 * 5th magnitude,
 * 84
 * }
 * 84
 * }