Fourteen Weeks in Descriptive Astronomy |
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Page 31
Joel Dorman Steele. of motion , and all accompanying the planet in its journey around the sun . Here was a miniature Copernican system , hung up in the sky for all to see and examine for themselves . Reception of the discoveries ...
Joel Dorman Steele. of motion , and all accompanying the planet in its journey around the sun . Here was a miniature Copernican system , hung up in the sky for all to see and examine for themselves . Reception of the discoveries ...
Page 32
... motion as we have learned them in Philosophy . When a body is once set in motion , it will continue to move forever in a straight line , unless another force is applied . As there is no friction in space , the planets do not lose any of ...
... motion as we have learned them in Philosophy . When a body is once set in motion , it will continue to move forever in a straight line , unless another force is applied . As there is no friction in space , the planets do not lose any of ...
Page 38
... motion - thus making 15 ° equal to one hour of motion . Through these divi- sions run twenty - four meridians , each constituting an hour of motion ( time ) or 15 ° of space . The Hour Circles may be conceived as meridians of ter ...
... motion - thus making 15 ° equal to one hour of motion . Through these divi- sions run twenty - four meridians , each constituting an hour of motion ( time ) or 15 ° of space . The Hour Circles may be conceived as meridians of ter ...
Page 53
... luminous bridges . The spots are in motion . They change from day to day ; but they all have a common movement . About fourteen days are required for a spot to pass across the disk of the sun from the eastern side. THE SUN . 53.
... luminous bridges . The spots are in motion . They change from day to day ; but they all have a common movement . About fourteen days are required for a spot to pass across the disk of the sun from the eastern side. THE SUN . 53.
Page 55
... AND SIDEREAL REVOLUTION . X Synodic and sidereal revolution of the spots . - We can easily understand why we make an allowance for the motion of the earth in its orbit . Suppose a solar spot at a , on a line passing from THE SUN . 55.
... AND SIDEREAL REVOLUTION . X Synodic and sidereal revolution of the spots . - We can easily understand why we make an allowance for the motion of the earth in its orbit . Suppose a solar spot at a , on a line passing from THE SUN . 55.
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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