Daily Arizona silver belt., 1910-03-13
St. Louis University As tronomer Tells of Hal
 ley's Visitor
COMING CLOSE TO
 EARTH THIS TIME
Phenomenon May Be LO- cated With Naked Eye
 During April


 whole world has been hushed in silent expectation. When will the famous his toric comet return9 Will it ever come back again2 These and many other questions were put. by the learned as well as the unlettered
 Suddenly on the clear stilly night of September II, 1909 the cry goes forth from Heidelberg: CT have the comet; here it is.'' On electric wings the news is flashed to all parts of the world. Professor Max Wolf was the first hu- man being to discover Halley's comet since it's last appearance seventy-fve years ago. He succeeded in taking the first picture of the visitor. Then came the cry from America: "I see the comet; here it is. .' ProIessor Barnard was the first to see the comet, viewing it through the forty-inch Yerkes tele- scope on September l6.
 Since that time all the telescopes of the world have been ~ointed toward the approaching visitor. Ever since the day when the comet was first picked up here in St. Louis by St. Louis university, it has been an object of constant study; its position accurately determined; it's development has been carefully noted; and now the wanderer IS gradually sinking in the west, soon to be lost in deep twilight, to reappeab however, again in April visible to the naked eye.
 In answer to the many inquiries made at the university concerning the invisi' bility of the wandering visitor, Profes- sors Cloud and Wilczewski offer these explanations:
 See Comets Follow Same Line
 "The stars in the heavens rise in the east and set in the west just as our z sun does. This is, of course, due to the earth's rotation on its axis. All comets that appear in the sky follow the same law, rising and setting with the rising and setting stars.
 "In September Halley's comet was situated near the bright star Aldebaran, in the constellation of Taurus. This star at that time rose in the east about 6 o'clock in the evening, travelled across the sky during the whole night and set in the west early in the fol lowing morning. The comet travelling with this star was, therefore, visible in the telescope during the whole night. This apparant motion of the comet across the sky is due, as is evident, not to its own motion, but to the rotation of the earth. The comet, however, has a motion of it's own. Due to this, we find it, during the month of January, ap- preaching the group of stars known as Fishes.
 ''This constellation rose in the begin ming of January early in the afternoon and set shortly after midnight, From midnight until sunset these stars and the comet were hidden in daylight. Hence the comet could be viewed only from sunset until midnight. On Febru ary 5 the comet was found near the star called 'Epsilion Pisclum. This star, on that day, set at 10 o'clock in the evening. Hence observations of the comet could be made only from sunset until that hour.
 "On February F the celestial wan derer disappeared below the western horizon before 9:30. o'clock. On Wed nesday evening the comet was observed from clock until 7:55, when it van ished in the west.
 "Towards the middle of the month of March the comet will rise with the rising sun and vanish in the west at sunset. Hence, during all this time Haley will be overhead in broad day light and below the horizon at night.
 Description of Its Movements
 "A glance at the heavens confirms the statements. For clearness' sake all the circles representing the various positions of the planets in their revolu- tions around the sun are omitted. The view shows only the relative positions of the earth, the sun and Haley s com. ct for different dates from the begin ming of this month until the Fourth of July. The circular curve indicates the earth $ path around the sun. The clip tic curve traces the comet s journey in space
 "The comet s position from the mid de of March until April 1 is marked on it's path. Our own location for the same period is emphasized on the circle. The sun during this time is between us and our illustrious visitor. Hence the cmOet will be in the sky during the day time. Since the earth revolves on it's axis, at night we will be in the dark, and the comet will be in the light on the opposite side,
 April Will Bring Change
 "This state of affairs will last until April, when the comet and the earth will have approached each other con siderably. It is at this time that the wanderer will be viewed with the naked eye. The question may be asked The comet will be best seen on the morning of April l, rising in the east about two hours before daybreak.
 "The comet is then moving very fast. On April 20 it will be nearest to the sun. IL will then move at US swIlte. rate. The comet and the earth will ther approach each other at q terrific spec faster than the fastest cannon balls May IS they will pass each other; comet will stretch forth it's tail toward us. For about two hours we will sweep tnrnmnh thn nnmntnrN nnnnnhnnn A11rr