Fourteen Weeks in Descriptive Astronomy |
From inside the book
Results 1-5 of 23
Page 7
... Herschel . .Mitchell . Whewell . Annual of Scientific Discovery .. The Chemical News . .... Kneeland . PUBLISHERS ' NOTICE . - Teachers will find in each edition of this Series certain changes ; not such , however , as to cause any ...
... Herschel . .Mitchell . Whewell . Annual of Scientific Discovery .. The Chemical News . .... Kneeland . PUBLISHERS ' NOTICE . - Teachers will find in each edition of this Series certain changes ; not such , however , as to cause any ...
Page 48
... Herschel says that if a solid cylinder of ice 45 miles in 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 ...
... Herschel says that if a solid cylinder of ice 45 miles in 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 ...
Page 52
... 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 , a spot over 107,000 ...
... 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 , a spot over 107,000 ...
Page 58
... Herschel relates that when examining a spot through his telescope , he turned away for a moment , and on looking back it was gone . X The appearance of the spots is periodical . — It is a re- markable fact that the number of spots ...
... Herschel relates that when examining a spot through his telescope , he turned away for a moment , and on looking back it was gone . X The appearance of the spots is periodical . — It is a re- markable fact that the number of spots ...
Page 59
... Herschel first advanced the idea that years of abundant spots would be years also of plen- tiful harvest . This is not now generally received . What two years could be more dissimilar than 1859 and 1860 ? Both abounded in solar spots ...
... Herschel first advanced the idea that years of abundant spots would be years also of plen- tiful harvest . This is not now generally received . What two years could be more dissimilar than 1859 and 1860 ? Both abounded in solar spots ...
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