Fourteen Weeks in Descriptive Astronomy |
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Page 30
... telescope completed that would magnify thirty times . It was a very simple affair - only a piece of lead pipe with glasses set at each end ; but it was the first telescope ever made , and destined to over- throw the old Ptolemaic theory ...
... telescope completed that would magnify thirty times . It was a very simple affair - only a piece of lead pipe with glasses set at each end ; but it was the first telescope ever made , and destined to over- throw the old Ptolemaic theory ...
Page 31
... telescope lest they might become victims of the philosopher's magic . Some prated of the wickedness of digging out valleys in the fair face of the moon . Others doggedly clung to the theory they had held from their youth up . As a ...
... telescope lest they might become victims of the philosopher's magic . Some prated of the wickedness of digging out valleys in the fair face of the moon . Others doggedly clung to the theory they had held from their youth up . As a ...
Page 32
... telescope . Philosophers gradually adopted this view , and the Ptolemaic theory became a relic of the past . In 1666 , Newton , a young man of twenty - four years , was spending a season in the country , on account of the plague which ...
... telescope . Philosophers gradually adopted this view , and the Ptolemaic theory became a relic of the past . In 1666 , Newton , a young man of twenty - four years , was spending a season in the country , on account of the plague which ...
Page 36
... telescope they can be traced , and an astronomer will find certain stars as well at noon as at midnight . Indeed , when looking at the sky from the bottom of a deep well or lofty chimney , if a bright star happens to be directly ...
... telescope they can be traced , and an astronomer will find certain stars as well at noon as at midnight . Indeed , when looking at the sky from the bottom of a deep well or lofty chimney , if a bright star happens to be directly ...
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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