Category: Science - Physics
Definition of Astronomy—Fundamental Law of the 3-64 Stars—Relations of the Earth to the Universe—Ordinary Appearance of the Sky—The Horizon, the Zenith, and the Meridian—Locating the Stars—Altitude and Azimuth—Circular or Angular Measure—Altitude Circles and Vertical Circles—T...
Definition of Astronomy—Fundamental Law of the 3-64 Stars—Relations of the Earth to the Universe—Ordinary Appearance of the Sky—The Horizon, the Zenith, and the Meridian—Locatin...
2. PART II—THE EARTH.Nature, Shape, and Size of the Earth—The Polar 67-123 Compression and Equatorial Protuberance, and their Cause—The Attraction of Gravitation—The Mass of the Earth: how Found—How...
3. PART III—THE SOLAR SYSTEM.The Sun—Distance, Size, and Condition of the 127-215 Sun—Temperature of the Sun—Solar Heat on the Earth, and its Mechanical Equivalent—Peculiar Rotation of the Sun—Sun-spots, th...
4. PART IV—THE FIXED STARS.Division of the Stars into Magnitudes—Division of 219-257 the Stars according to their Spectra—Stars Larger and Smaller than the Sun—The Distances of the Stars—Variable Stars—Do...
5. PART I.=1. Definition of Astronomy.= Astronomy has to do with the earth, sun, moon, planets, comets, meteors, stars, and nebulæ; in other words, with the universe, or “the aggregate of...
6. PART II.=1. Nature, Shape, and Size of the Earth.= The situation of the earth in the universe has been briefly described in Part I; it remains now to see what the earth is in itself, an...
7. Part I, Sect. 8). Having passed the solstice, the sun begins to declineagain toward the equator. For a short time the declination diminishes slowly because the course of the ecliptic close to the solstice is nearly parallel to the equator, and in t...
8. PART III.=1. The Sun.= By the term solar system is meant the sun together with the system of bodies (planets, asteroids, comets and meteors) revolving round it. The sun, being a star, ev...
9. PART IV.=1. The Stars.= The stars are distant suns, varying greatly in remoteness, in magnitude, and in condition. Many of them are much smaller than our sun, and many others are as muc...