Fourteen Weeks in Descriptive Astronomy |
From inside the book
Results 1-5 of 27
Page 10
... effect upon the weather . ( P. 170. ) Prof. Hall , as the result of his observations on the satel- lites of Mars discovered by him ( p . 171 ) , fixes the density of that planet at .776 . ( P. 181. ) Jupiter and Saturn are older planets ...
... effect upon the weather . ( P. 170. ) Prof. Hall , as the result of his observations on the satel- lites of Mars discovered by him ( p . 171 ) , fixes the density of that planet at .776 . ( P. 181. ) Jupiter and Saturn are older planets ...
Page 54
... - These changes can be accounted for only on the supposition that the sun revolves on its axis : indeed , they are the precise effects which the laws of perspective demand in that case . About twenty. 54 THE SOLAR SYSTEM .
... - These changes can be accounted for only on the supposition that the sun revolves on its axis : indeed , they are the precise effects which the laws of perspective demand in that case . About twenty. 54 THE SOLAR SYSTEM .
Page 75
... effect is changed . To an observer at the sun all the motions would be real , while to us many are only apparent . The position of a planet , as seen from the centre of the sun , is called its heliocentric place ; as seen from the ...
... effect is changed . To an observer at the sun all the motions would be real , while to us many are only apparent . The position of a planet , as seen from the centre of the sun , is called its heliocentric place ; as seen from the ...
Page 95
... effect of shadows cast by mountains . Spots have been noticed on its disk which are considered to be traceable to clouds . Indeed , Herschel thinks that we never see the real body of the planet , but only its atmosphere loaded with ...
... effect of shadows cast by mountains . Spots have been noticed on its disk which are considered to be traceable to clouds . Indeed , Herschel thinks that we never see the real body of the planet , but only its atmosphere loaded with ...
Page 121
... effect is called the Precession of the Equinoxes , because the position of the equinoxes in any year precedes that which they occupied the year before . Since the circle of the ecliptic is divided into 360 ° , it follows that the time ...
... effect is called the Precession of the Equinoxes , because the position of the equinoxes in any year precedes that which they occupied the year before . Since the circle of the ecliptic is divided into 360 ° , it follows that the time ...
Other editions - View all
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