Fourteen Weeks in Descriptive Astronomy |
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Page 49
... globe the size of the sun . Its mass is 674 times that of all the rest of the solar system . Its weight may be expressed in tons thus , 1,910,278,070,000,000,000,000,000,000 , or Fig . 4 . limb Edge of the Sun Moon ! Orbit • Earth of ...
... globe the size of the sun . Its mass is 674 times that of all the rest of the solar system . Its weight may be expressed in tons thus , 1,910,278,070,000,000,000,000,000,000 , or Fig . 4 . limb Edge of the Sun Moon ! Orbit • Earth of ...
Page 62
... globe , surrounded by three atmospheres . The first , nearest the black body of the sun , is a dense , cloudy covering , pos- sessing high reflecting power . The second is called the photosphere . It consists of an incandescent gas ...
... globe , surrounded by three atmospheres . The first , nearest the black body of the sun , is a dense , cloudy covering , pos- sessing high reflecting power . The second is called the photosphere . It consists of an incandescent gas ...
Page 65
... globe for millions of years yet to come . THE PLANETS . We shall 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 ...
... globe for millions of years yet to come . THE PLANETS . We shall 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 ...
Page 69
... globe two feet in diameter for the Sun : Vulcan will then be represented by a small pin's head , at a distance of about 27 feet from the centre of the ideal sun ; Mercury by a mustard - seed , at a distance of 82 feet ; Venus by a pea ...
... globe two feet in diameter for the Sun : Vulcan will then be represented by a small pin's head , at a distance of about 27 feet from the centre of the ideal sun ; Mercury by a mustard - seed , at a distance of 82 feet ; Venus by a pea ...
Page 86
... globes as large as Mer- cury to make one the size of the earth , or 25,000,000 to equal the sun . Yet as it is denser than the earth , its weight is nearly that of the earth , and a stone let drop upon its surface would fall 71⁄2 feet ...
... globes as large as Mer- cury to make one the size of the earth , or 25,000,000 to equal the sun . Yet as it is denser than the earth , its weight is nearly that of the earth , and a stone let drop upon its surface would fall 71⁄2 feet ...
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Common terms and phrases
ancients Andromeda angle aphelion appear Aries astronomers atmosphere axis Boötes bright brilliant Canis Minor Capricornus Cassiopeia cause Celestial Sphere centre Cepheus circle color comet conjunction constellation Cor Caroli dark density Describe diameter disk earth east ecliptic equal equator equinoctial figure fixed stars full moon globe heat heavenly bodies heavens Hercules Herschel horizon inclined inferior conjunction inferior planet Jupiter latitude length light luminous lunar Lyra magnitude Mars mean distance Mercury meridian meteors miles moon's motion move naked eye nearly nebula Neptune night node north pole Orion parallax pass path penumbra perihelion Perseus Pisces polar Polaris precession rays revolve ring rising Saturn seasons seen shine side sidereal sidereal day solar day solar system solstice space spots summer sun's surface synodic revolution tance Taurus telescope theory tion Uranus Ursa Major Ursa Minor varies velocity Venus vernal equinox visible winter Zodiac