Fourteen Weeks in Descriptive Astronomy |
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Page 30
... naked eye . The next night he noticed that those stars had changed their relative positions . Aston- ished and perplexed , he waited three days for a fair night in which to resume his observations . The fourth night was favorable , and ...
... naked eye . The next night he noticed that those stars had changed their relative positions . Aston- ished and perplexed , he waited three days for a fair night in which to resume his observations . The fourth night was favorable , and ...
Page 31
... eyes , two ears , and one mouth . So in the heavens there are two favorable stars , Jupiter and Venus ; two ... naked eye , can exercise no influence over the earth , and would be useless , and therefore do not exist . Besides ...
... eyes , two ears , and one mouth . So in the heavens there are two favorable stars , Jupiter and Venus ; two ... naked eye , can exercise no influence over the earth , and would be useless , and therefore do not exist . Besides ...
Page 36
... naked eye even at midday . In this way it is said a celebrated optician was first led to think of there being stars by day as well as by night . One half of the sphere is constantly visible to us ; and so far distant are the stars ...
... naked eye even at midday . In this way it is said a celebrated optician was first led to think of there being stars by day as well as by night . One half of the sphere is constantly visible to us ; and so far distant are the stars ...
Page 50
... naked eye , and at mid- day by using a smoked glass . The disk will appear to us perfectly distinct and circular , and with no spot to dim its brightness . If we use , however , a telescope of moderate power , taking the precaution to ...
... naked eye , and at mid- day by using a smoked glass . The disk will appear to us perfectly distinct and circular , and with no spot to dim its brightness . If we use , however , a telescope of moderate power , taking the precaution to ...
Page 52
... naked eye for an entire week . On the day of the eclipse in 1858 , a spot over 107,000 miles broad was distinctly seen , and attracted general attention in this country . Some who read this paragraph will doubtless recall its ap ...
... naked eye for an entire week . On the day of the eclipse in 1858 , a spot over 107,000 miles broad was distinctly seen , and attracted general attention in this country . Some who read this paragraph will doubtless recall its ap ...
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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