Fourteen Weeks in Descriptive Astronomy |
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Page 40
... inclined to the equinoctial 23 ° 28 ' , which measures the inclina- tion of the Earth's Equator to its orbit , and is called the obliquity of the ecliptic . • ( b ) The SUBORDINATE CIRCLES are Circles of Celestial Longitude , the ...
... inclined to the equinoctial 23 ° 28 ' , which measures the inclina- tion of the Earth's Equator to its orbit , and is called the obliquity of the ecliptic . • ( b ) The SUBORDINATE CIRCLES are Circles of Celestial Longitude , the ...
Page 56
... inclined to the ecliptic ( 7 ° 15 ' ) . The spots have a motion of their own . - Besides the motion already named as assigned to the sun's rota- tion , the spots seem to have a motion of their own , and this fact is undoubtedly the ...
... inclined to the ecliptic ( 7 ° 15 ' ) . The spots have a motion of their own . - Besides the motion already named as assigned to the sun's rota- tion , the spots seem to have a motion of their own , and this fact is undoubtedly the ...
Page 66
... inclined to the ecliptic , and intersect it in two points , which are the nodes one half of the orbit lying north and the other south of the earth's path . 4. They are opaque bodies like the earth , and shine by reflecting the light ...
... inclined to the ecliptic , and intersect it in two points , which are the nodes one half of the orbit lying north and the other south of the earth's path . 4. They are opaque bodies like the earth , and shine by reflecting the light ...
Page 69
... inclined ellipse ; at some point it must rise above the level of the fixed plane : this point is called the ascending node , and the opposite point of intersection is termed the descending node . A line connecting the two nodes is ...
... inclined ellipse ; at some point it must rise above the level of the fixed plane : this point is called the ascending node , and the opposite point of intersection is termed the descending node . A line connecting the two nodes is ...
Page 86
... inclined from a perpendicular , its seasons are peculiar . There are no distinct frigid zones ; but large re- gions near the poles have six weeks continuous day and torrid heat , alternating with a night of equal length and arctic cold ...
... inclined from a perpendicular , its seasons are peculiar . There are no distinct frigid zones ; but large re- gions near the poles have six weeks continuous day and torrid heat , alternating with a night of equal length and arctic cold ...
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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