Fourteen Weeks in Descriptive Astronomy |
From inside the book
Results 1-5 of 42
Page 35
... diameter of the earth's orbit , so that if we should draw two parallel lines , one from each end of the earth's orbit , to the sphere , although these lines would be 183,000,000 miles apart , yet they would be extended so far that we ...
... diameter of the earth's orbit , so that if we should draw two parallel lines , one from each end of the earth's orbit , to the sphere , although these lines would be 183,000,000 miles apart , yet they would be extended so far that we ...
Page 37
... diameter of the earth . No two places have the same sensible horizon : any two on opposite sides of the earth have the same rational horizon . ( b ) THE SUBORDINATE CIRCLES . - These are the Prime Vertical circle and the Meridian . A ...
... diameter of the earth . No two places have the same sensible horizon : any two on opposite sides of the earth have the same rational horizon . ( b ) THE SUBORDINATE CIRCLES . - These are the Prime Vertical circle and the Meridian . A ...
Page 48
... diameter and 200,000 miles long were plunged , end first , into the sun , it would melt in a second of time . APPARENT SIZE . — It appears to be about a half de- gree in diameter , so that 360 disks like the sun , laid side by side ...
... diameter and 200,000 miles long were plunged , end first , into the sun , it would melt in a second of time . APPARENT SIZE . — It appears to be about a half de- gree in diameter , so that 360 disks like the sun , laid side by side ...
Page 52
... diameter . Sir J. W. Herschel calculated that one which he saw was 50,000 miles in diameter . In 1843 one was seen which was 14,816 miles across , and was visible to the naked eye for an entire week . On the day of the eclipse in 1858 ...
... diameter . Sir J. W. Herschel calculated that one which he saw was 50,000 miles in diameter . In 1843 one was seen which was 14,816 miles across , and was visible to the naked eye for an entire week . On the day of the eclipse in 1858 ...
Page 69
... 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 , at a distance of ...
... 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 , at a distance of ...
Other editions - View all
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