Fourteen Weeks in Descriptive Astronomy |
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Page 94
... atmosphere . This was established by the fact that at the transit of Venus over the sun in 1761 and 1769 , a faint ring of light was observed to surround the black disk of the planet . The evidence of an atmosphere , as well as of ...
... atmosphere . This was established by the fact that at the transit of Venus over the sun in 1761 and 1769 , a faint ring of light was observed to surround the black disk of the planet . The evidence of an atmosphere , as well as of ...
Page 95
... atmosphere Fig . 26 . which diffuses the rays of light into regions where the sun has already set , has hence been inferred . Thus , on Venus , the evenings , like ours , are lighted by twilight , and the mornings by dawn . ( 2. ) The ...
... atmosphere Fig . 26 . which diffuses the rays of light into regions where the sun has already set , has hence been inferred . Thus , on Venus , the evenings , like ours , are lighted by twilight , and the mornings by dawn . ( 2. ) The ...
Page 103
... atmospheric strata do not revolve with the earth . Upon that hypothesis , since we rotate in our latitude with the velocity of 333 yards in a second , there would result a wind in the contrary direction ten times more violent than the ...
... atmospheric strata do not revolve with the earth . Upon that hypothesis , since we rotate in our latitude with the velocity of 333 yards in a second , there would result a wind in the contrary direction ten times more violent than the ...
Page 130
... atmosphere extends above the earth about 500 miles . Near the surface it is dense , while in the upper regions it is exceedingly rare . The rays of light from the heavenly bodies Fig . 36 . M L ... REFRACTION . A passing through these ...
... atmosphere extends above the earth about 500 miles . Near the surface it is dense , while in the upper regions it is exceedingly rare . The rays of light from the heavenly bodies Fig . 36 . M L ... REFRACTION . A passing through these ...
Page 131
... atmosphere , would send a direct ray to L. Instead , the ray at A is refracted downward , and would then enter the eye at N ; passing , however , through a layer of a differ- ent density , at B it is again bent , and meets the eye of ...
... atmosphere , would send a direct ray to L. Instead , the ray at A is refracted downward , and would then enter the eye at N ; passing , however , through a layer of a differ- ent density , at B it is again bent , and meets the eye of ...
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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