Fourteen Weeks in Descriptive Astronomy |
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Page 9
... diameters and distances of the planets , etc. Meanwhile , it has not seemed desirable to change the data of this ... diameter - a decrease so insignificant as to be imperceptible with the best instruments ; or by the annual impact of ...
... diameters and distances of the planets , etc. Meanwhile , it has not seemed desirable to change the data of this ... diameter - a decrease so insignificant as to be imperceptible with the best instruments ; or by the annual impact of ...
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 ...
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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