Show FACTS CONCERNING HAL-LEY'S Identified by Edmund Halley who predicted its return in fixing the period of its revolution in its orbit at sey-enty-five to seventy-nine This was the first recorded prediction of a comet's t Previous appearances identified as far back as B. C. Sir Robert Ball identifies it as the comet that appeared in 2616 B. the year of Conjectural diameter of the length of estimates ranging from to Present speed about twenty-five miles a Its inclined to that of the earth at an angle of 18 extends beyond that of the outermost planet of our to a distance of about miles from the Its speed is greatest near the and so rapidly as the distance increases that half of its period is spent in that part of its orbit lying beyond |