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 ...

First Paragraph: | The latest volume of the Annals of the Zo-se Observatory in Zi-ka-wei, near Shanghai in China, was received recently and is more than usually interesting. It is for the year 1911, and consists of four ...

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 ...

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 ...

First Paragraph: | Halley’s comet, as we know, moves in a very elongated ellipse. While its farthest excursions carry it beyond the outermost planet of our system, its nearest approach to the Sun is almost half of our ...

First Paragraph: | In these days of unrest, when the alignment of nations, no less than their own internal machinery, is so seriously threatened with disarrangement that the established order of thousands of years runs ...

First Paragraph: | The very important place that mathematics occupies in education is sufficiently evinced by the fact that it has always been judged to be an essential branch in the curriculum of every school of learning ...

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.

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 ...

First Paragraph: | The solar system is commonly divided into four parts. The first is the sun, occupying the central position, and dominating the motions of all the other members by his overpowering attraction. The second ...