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Rigge v. Dean exchange on Halley’s Comet and Pope Callixtus III
The Rigge v. Dean exchanges were a series of articles between Fr. William Rigge, S.J. and John Dean debating the historicity of the stories surrounding Pope Calixtus III and Halley's Comet that appeared in Popular Astronomy ...
Realm of Science April 20th 1916
First Paragraph: | The reform of our present calendar is a subject on which probably more printers’ ink has been wasted during recent years than on any other. Each scheme proposed—and there are at least seventy-two of them, ...
Realm of Science December 20th 1917
First Paragraph: | A short time ago a little boy about ten years old asked me this question, “What makes the stars shine!” I dare say that most of us would feel somewhat puzzled in an attempt to give a simple and satisfactory ...
Experimental Proofs of the Earth’s Rotation
First Paragraph: | In establishing the truth of the Copernican system, professors of astronomy are apt to look upon Foucault’s pendulum as the one experimental proof of the earth’s diurnal rotation. They may also possibly ...
Dates of Easter for Two Thousand Years
First Paragraph: | Whenever we take up the calendar of a new year our first inquiry is concerning the date of Easter, since its position regulates the dates of all the movable feasts of the year. This is as it ought to be.
The Driving Clock and the Clamp and Slow-Motion Screw of an Equatorial
First Paragraph: | Providing an equatorial telescope with an efficient driving clock, and bringing the clamp and slow-motion screws on both axes down to the eyepiece, appear to be so exclusively the work of a professional ...
Cuspidal Envelope Rosettes
First Paragraph: | A point P moves in the line segment EG, Fig. 1, with simple harmonic motion of p cycles, while this segment makes q revolutions about A with uniform angular speed. Moritz has exhaustively treated the ...
Science in a Smokestack
First Paragraph: | Ever since the time when Foucault, fifty years ago, swung his memorable pendulum from the dome of the Pantheon in Paris and gave to the world the first experimental proof of the rotation of the earth, ...
The Time of Sunrise and Sunset
First Paragraph: | If the reader is astronomically inclined, and has personally compared the calendar times of the rising and setting of the sun and the moon with those of his own observation, he must certainly have found ...
The Eclipses of 1905
First Paragraph: | Of the two solar and two lunar eclipses occur ring in the course of the year 1905, one of each class will be more or less visible in the United States.