Fourteen Weeks in Descriptive Astronomy |
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Page 65
... describe these in regular order , passing outward from the sun . In this journey weshallex- amine each planet in turn , noticing its distance , size , length of its year , duration of day and night , temperature of the climate , the ...
... describe these in regular order , passing outward from the sun . In this journey weshallex- amine each planet in turn , noticing its distance , size , length of its year , duration of day and night , temperature of the climate , the ...
Page 66
... describe oval or elliptical paths round the sun — not , however , differing greatly from circles . 3. Their orbits are more or less inclined to the ecliptic , and intersect it in two points , which are the nodes one half of the orbit ...
... describe oval or elliptical paths round the sun — not , however , differing greatly from circles . 3. Their orbits are more or less inclined to the ecliptic , and intersect it in two points , which are the nodes one half of the orbit ...
Page 121
... describes a small circle in the starry vault twice 23 ° 28 ′ in diameter . To illustrate this , in the cut we suppose that after a series of years the position of the earth's equator has changed from eƒh to g Kl . The inclination of the ...
... describes a small circle in the starry vault twice 23 ° 28 ′ in diameter . To illustrate this , in the cut we suppose that after a series of years the position of the earth's equator has changed from eƒh to g Kl . The inclination of the ...
Page 125
... describing , in about 26,000 years , a small circle twice 23 ° 28 ' in diameter . Precession illustrated in the spinning of a top . - This motion of the earth's axis is most singularly illus- trated in the spinning Fig . 34 . of a top ...
... describing , in about 26,000 years , a small circle twice 23 ° 28 ' in diameter . Precession illustrated in the spinning of a top . - This motion of the earth's axis is most singularly illus- trated in the spinning Fig . 34 . of a top ...
Page 137
... describe a minute ellipse in the course of a year , the central point of which is the place the star would actually occupy were our globe at rest . PARALLAX . This is the difference in the direction of an object as seen from two ...
... describe a minute ellipse in the course of a year , the central point of which is the place the star would actually occupy were our globe at rest . PARALLAX . This is the difference in the direction of an object as seen from two ...
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Common terms and phrases
ancients Andromeda angle aphelion appearance Aries astronomers atmosphere axis body Boötes bright brilliant Canis Minor Capricornus Cassiopeia celestial centre Cepheus circle color comet conjunction constellation Cor Caroli dark density Describe diameter disk Draco earth east ecliptic equal equator equinoctial figure fixed stars full moon globe heat heavens Hercules Herschel horizon inclined inferior inferior conjunction inferior planet Jupiter latitude length light lunar Lyra magnitude Mars mean distance Mercury meridian meteors miles moon moon's motion move naked eye nearly nebula Neptune node north pole orbit Orion parallax pass path penumbra perihelion Perseus Pisces planet Polaris precession rays revolve ring rising Saturn seasons seen shadow shines shower sidereal sidereal day solar day solar system space spots summer sun's superior planet surface synodic revolution tance Taurus telescope theory tion Uranus Ursa Major Ursa Minor varies velocity Venus vernal equinox visible zodiac